Intelligence is a curse, since you run into more barriers. But also an asset, because you are more adaptable than others. I think the social aspect is what a lot of smart people lack (assuming you are smart, from your gaming history). Tryout for an eSports team. They will give you a structured practice schedule. If you never disagree with or blame any of your teammates, then you can make a few friends which can be funner than sologrind.
Maybe try PokerStars for cash IRL? Farming in Path of Exile could also net you some cash.
If you enjoyed Brood Wars you may also enjoy other retail RTS games that have come out in the past few years (not sure which ones have learning curves). I think that Bloodline Champions would keep you interested for a few days. Exact Aiming is also a good singleplayer game. I highly-recommend it. Very high skillcap I heard Quake has a high skillcap.