Changing opening around 1500

Try the Ruy. It's worth it.

I will consider it, but for now i dont think is a good time to be reading so much theory, but thanks for the ideia

You don't have to learn loads of theory to play the Ruy Lopez.

Only some people say that like Gothamchess just because he doesn't like main lines. They're wrong though.

This is the most instructive opening for beginners as it teaches you classical chess principles: develop, control the centre and attack.

Four Knights scotch

Or

Four Knights Spanish 

Or 

Italian

Or

Scotch 

Writing for award :=)

Why does everyone think that you have to learn 20 moves of theory in Ruy and Sicillian?.

You are 1550 rapid, you can definitely find your way around. Ruy is an excellent choice imo. 

Honestly, I'd just play the Italian. When I was 1550, I was still consistently getting games where I played the Italian and won instantly in the opening. All you really need to know for the Italian are the Fried Liver and Evans Gambit, and sometimes a couple other lines like the Polerio defense and a bunch of traps against it (such as Traxler, Blackburne-Shilling gambit, Fritz variation, Ponziani-Steinitz Gambit), although most of these traps can be dealt with by just playing normal chess and not taking on f7 with the knight like you usually do. 

If you face the Sicilian, I like playing the alapin (because it's a lot less theory-dense than a bunch of other Sicilian lines). I'm pretty bad at playing against the Sicilian though, so take it with a grain of salt.

Learn Ruy when you're at least 1700 or 1800. it's very positional and theory heavy. How about the good old italian game? there are lots of similarities between ruy and italian, (lots of differences too). but you will master the basics and have a good foundation to move forward

First, you're 1200 and I don't think you're capable of giving such advice.

Second, Ruy is a highly positional opening and NOT beginner friendly. The very first things you learn in Ruy are the most common theories to build up your mental understanding of this opening. Then you start to learn some variations and beyond. This opening has SO MANY theories, I've been playing Ruy for 2-3 years now and I haven't even finished studying all of them.

I wouldn't suggest someone play Ruy by messing around with it. It's not a good way to learn because you don't have that understanding of the opening yet. You can mess around with it however you like, IF you understand it in the first place, so you wouldn't get into a worse position during live games.

It doesn't really matter what you think. You are getting confused by me reviving a 5 year old account.

I am not gonna bother with this anymore as the last person who tried to prove his point is muted now (though, fully deserved).

What's so BEST about Ruy?

I don't care what your "real rating" or whatever is. Either way, asking someone to play Ruy by messing around with it without understanding it first is dangerous advice. If you're higher rated like you implied (I doubt it), you should have known better.

Yes but my own vienna experience is not the greatest and i cannot see the plans or even the ideas of a grandmaster playing the vienna

I already chosen the dutch against d4 and the caro for e4, but they could be an option, thank you

1-i been playing it for like 2 to 3 months

2-aparrently yes but i never look out in depth

try the queen's gambit.