Any advice on openings to practice?

Hi everyone, 

Currently hitting the brick wall with getting better at chess, currently at 750 elo. Finding I'm struggling to follow openings since I watch a lot of different openings from YouTube & in-depth explanations etc but as soon as I start a game and they do something different I'm straight back square one.  as much as I would like to get better, it just isn't that fun getting wrecked each game? 

Any advice around how to improve or maybe a good opening to just focus some more energy into rather than try all these different ones?

Then it isn't opening sequences that you would benefit from studying... it's opening principles.

First the simple stuff like center control, king safety, pawn structure and initiative.

Then the slightly more complex stuff like using Pawn levers to create activity.

Thanks @blueemu, will dive into understanding those areas better

@Caffeineed lol, im not super fussed I off and on play this game as a past time so improving would be cool but I aint trying to be some GM haha

Is there an opening that do not require a lot of memorization?

As said above: learning openings is not about memorizing, but about understanding opening priciples and aplying these on the actual opening. That is actually all you have to do for a very long time.

At some time you may have to do a bit of memorizartion. That will primarily be in very concrete and tactical lines. To avoid that you may play system openings (like the London) but that will probably also stop your development as a chess player.

'Memorization of variations could be even worse
than playing in a tournament without looking in the books at all.” - Botvinnik

Yes, it does.

I've had players trying to play popular book lines against me (the case that I'm thinking of was a Sicilian Najdorf Poisoned Pawn variation) and blunder a mate-in-one (quite literally) because they don't even understand what each side is threatening in that line.

Memorization without understanding is just a fancy way to get into trouble.

It might be helpful to focus on one or two main openings for each side (as white and black) and really understand the key ideas and plans behind them.

At our level... mine as well as yours... our only important task in the opening is to reach a middle-game position in which we feel comfortable and confident.

Everything else is either personal taste, or just fashion.