hey tehrealfake, I'd recommend you to just join a low division UGC team, or an ETF2L team if you're from europe. That's the way I got into competitive and I can tell you that playing with the same organized group of people periodicaly gives you 2 things: Fun (because you start making friends while playing with them) and an urge to become good, because you don't want to let them down (which kinda pressures you to get better and better every day).
Try some lobbies and mixes for a while to get a basic understanding of how 6s and highlander work and then just try to sneak your way into some league. I assure you you will enjoy it :)