A few suggestions (which you're probably going to disregard if you're like 90% of the players here)
1) Show a stronger player (or this forum) a few of your game losses and get critiqued ... it's easier / does wonders for your game QUICKLY to correct existing mistakes in your game than to try to build skyscrapers of chess knowledge ontop of a poor foundation.
2) Go over a ton of annotated game collections like Chernev's Logical Chess, Most Instructive Games of chess and Chess Master vs.Chess Amateur and sponge the way Masters play. You're a diamond member here, so immerse yourself with the instructional videos (appropriate for your level) and chess mentor drills.
3) Learn some basic opening systems (not the same as memorizing openings!) that lead to easy to understand positions (relatively speaking). Examples would be the Italian Game, Exchange French/Caro as White and the Scandinavian/French as Black. Leave the closed / positional games for later after you've proven that you can tactically handle yourself, i.e. can clearly see + deal with all your opponent's forcing responses to a move you play BEFORE you play it, nearly a 100% of the time.
I'm getting old now...and I want to improve in as short a time as possible. What five openings should I learn for Black and White. I don't really know the names...but I'd like to understand the logic in the open vs closed position games. But is it better to spread myself thin trying to grasp a little of everything or learn a few openings well? I like to attack...study tactics...but I don't really have a plan after trying to control the center. Once in a while my moves drop into perfect positions and I find comparing to masters games it was the right choices...but that's rare. I listen to a lot of Roman's videos and have bought quite a few of his videos too.