Looking for a solid defence against E4 as Black

You don't have to worry about opening theory yet, there's always time for that. I started learning a few openings at 1200-1300

You may think that you need an opening, but you don't. What you need is to stop blundering pieces.

Look at this game:

https://www.chess.com/analysis/game/live/34866676021

The opening is okay... and then you give up a knight for nothing on move 7, then you hang the queen on move 10, then you don't take a piece on move 11, then you don't take a rook on move 13, then I stopped looking at the game.

Even one of those blunders in a game is devastating. You need to stop hanging those pieces. Right now you are making completely random moves without calculating even half a move ahead. This needs to change. Nothing else matters at all.

Play 1...c6 and play slower time controls.

1...e5

Although i do agree with magipi that it's blunders that are the problem for low elo players, not lack of opening theory, a big part of avoiding blunders is playing an opening you enjoy and feel comfortable with. So i have some suggestions:

Firstly, i wouldn't play 10 mins at your level. Improving is so much easier on longer time controls. Play 15+10 or 30 minute games, and you will blunder less because you will be less concerned with making moves quickly.

I would probably recommend going back to the caro-kann purely for its simplicity and the fact that the ideas are very consistent and there isn't a million variations like in some other openings.

Avoid the sicilian like the plague, it's too complicated. I'm 1200 and I won't go near it. e5 is good but still has a lot of different variations, and i still trip up and blunder e4-e5 openings some times. The caro on the other hand doesn't have a ton of varations, (at least not good ones) The first two moves for black are virtually always the same, c6 and d5, and if white plays d4 you always need to remember the move c5 at some point to undermine the pawns in the centre, ideally with the dark square bishop eyeing c5 it so you won't panic if white captures it.

And in the caro, you always know that you don't mind trading the light squared bishop for a knight or white's bishop because your pawn structure is light squares for the most part in the opening. You don't need to think about whether a trade is worth it, the light square bishop is usually worth trading away in a caro-kann at this level. This repeats pretty much every game.

No need to memorise a million different possibilities, just remember c6, d5, get the light square bishop out of the pawn chain, respond to d4 with c5. The only major downside to the Caro-kann for low level players is it can be tricky figuring out how to develop the knights, but practice and analysis will sort that out for you. 

I really appreciate all of these feedback. I went back and reviewed that Sicilian game I played and I certainly blundered quite heavily. Probably not the opening its more that I blundered. So I'll keep trying using c6 for black and see if I have improved results

Yep! So I agree the Sicilian does lead to complicated positions where I need to have a better understanding of the game, that being said I do tend to gravitate towards it for some reason. So I'll go back and play around with the Karo for at least 5 more games taking advice on board I'll increase time controls to 15mins and see how I go from there! The reason I've been hunting for openings that I enjoy is because if It can get a few openings I'm comfortable with then I can focus on those and improve and be able to focus on the transition to middle, middle game and end game more to improve other aspects of my game and through repetition and experience improve at the openings I know. So far I'm playing Italian for white, Dutch for d5 or alternative openings when black and maybe the Sicilian dragon or Karo in or french for e5. What this enables me to achieve is a greater understanding at these openings and to develop check mating patterns or play around with different positions I reach when playing these openings. Does this kinda make sense and sound like a reasonable plan to develop as a chess player?

My final question is if I'm to play Karo or French. I'll do some research into this. But a lot of people suggest the French and I've heard similar for Karo. Why would I play one over the other as a newer player?

Solid defenses against 1.e4 = 1...e5, Caro-Kann, French

Chess Openings Resources for Beginners and Beyond...

https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond

Truth is, it really doesn't matter which opening you play at this point.

The sad truth no one wants to hear.

At your rating, 5 min spent learning tactics is worth 1 hr memorizing openings.

As others have said, it really doesn't matter. The point of openings at your level is just to give you a solid way to develop your pieces. I recommend the caro because it is a simple way of dealing with the first few moves without messing up and giving your opponents an opportunity to trick you. After the first few moves, you aren't going to be playing book theory. So learn to improve your board vision and see tactics. Which is exactly why i recommend playing with longer time controls. It will make it easier to look for them, and the more you find them, the quicker you will start to find them.

The thing is you can't really be that comfortable playing black. Caro Kann is the answer you're looking for, but it's not that simple, as you'll always be needing to respond to white unless they stuff up awfully. Carro is a decent defence though. There's already a few solid Caro Kann tips in this thread. But you'll need to learn Slav too, because -needing to respond to white- you'll end up in Slavland often enough. And you'll be glad to know your Sicilian Dragon study won't go to waste with Caro Kann either, because -needing to respond to white- well... you get the picture, transpositions can lead to emergency fiancettos. 

Sicilian is fine. If you're playing people at X rating, you only need to know it better than 99 percent of people at X rating who play e4, which luckily isn't that difficult below 1500 or so as most people don't play it for black. Probably a few videos on any variation of the Sicilian (you can choose, I'd recommend dragon as that's what I play) should be fine.

You have to be okay with occasionally losing in the opening, but you'll also occasionally win in the opening. If you think you like the Sicilian for whatever reason then try it out. If you really hate it you can always choose something else.

I will add that at your level opening theory isn't the most important thing though. Focus more on trying to avoid blunders, seeing opponent's blunders, and basic tactics.

Both in the Caro-Kann and in the French you allow White to build up a strong centre and restrain yourself to a slow, restricted game. Why would you do that?

I'd recommend playing 1. …e5 to attack d4 straight away, block its pawn on e4 to entering your camp and open lines for your own queen and bishop at the same time.  For all of these three reasons it'll allow you an earlier counter play. 

Well, the caro-kann doesnt trap in your bishop and in my experience leads to much better and easier to play positions it is in my main repertoire and is the best thing i could recomend to any begginer