Same situation here. I played a bit of EXVS 2~ years ago but mostly just offline, so I'm not completely new but I may as well be when it comes to FB online play. I've learned a lot playing in NA/EU rooms in the past 3 days but I still get wrecked pretty regularly against the veteran players. I primarly have issues with overheating and knowing when to melee, but I think I'm getting the hang of team health control and the basic fundamentals like fuwa step and on angle shooting.
edit: also kinda sucks that I can't really play ranked because I'm on the east coast (red bars errywhere with Japanese players).