No problem on the posting, thanks for introducting yourself either way.
Netcode isn't as solid as it could be for everyone, but it can be playable under better conditions (wired connections, close to opponent, etc). You might find a good person to spar and level up with online at any of our tournaments. Hopefully you'll be in for a pleasant surprise when you start it up. I'd recommend solidifying all the system basics first; KOF gives you a lot of mobility and combo options. The trials will ask you to do high-level stuff, but it's just as viable to win with fundaments and strategies. The whole cast is great and pretty balanced, and K', Kyo (EX and regular), and Terry make a good main team if you want to stick to them.
This'll be more like Street Fighter compared to Marvel, but has it's own great flavor.