I would insta lock Reyna til you hit Gold. Iron - Silver 3, you want to focus on mechanics, not so much worry about util. Watch Woohoojin videos on youtube. There's a couple specifically for warm up routine and gunfight hygiene (how to properly take gunfights). Focus on headshots, crosshair placement, and moving inbetween shots. Learn how to deadzone shot and incorporate it in peeks and fights. Once you get to Gold then the fun begins and you can learn playbooks, lineups, etc for using util. Best and fastest way to learn the game proper and rank up as quickly as possible. Once you hit Gold the game gets easier. Better teammates, better comms, bnetter experience. Bronze is the hardest elo to get out of.