b4 support, best move?


I prefer b3 here, a4 is also a good option.With b3, your dark square bishop can get active faster.
instead of e3, I like e4 better, and sharper. Give it a go if you want.
I would not recommend reti as first opening though, it's very complex and positional. Good luck anyways!

well i managed raising my rating by 300 in about a month using this opening, but to be honest i just got it under control and i encountered a new problem. when playing a solid opponent and middlegame start, i have absolutely no strategy and no clue how to proceed

Well, make a forum post about strategy, post some relevant games in it. But that's what SynCn was warning you about above. The games can be very strategically complex, very positional.

Here's a game that started off that way. Tough to find because black doesn't go that way very often, with good reason.