It's a great time to become a mid-level player, we have a lot of those, but the chances you will ever break into top 10 starting now, being so behind the curve on matchups and not understanding what mixups developed out of which and why, all the tiny little things that work and don't work. It's much too late to consider becoming a top player, and the work you would have to put in would be life-consuming and massive.
This is not what people want to hear, but it's Smash's red pill. A mature way to approach the scene would be to do it for fun, aim to place well at your locals and make money there. If you climb higher, there you go. You had the talent. If you don't, you made some friends.