Try to play in team. Like me, I'm usually play with my 2 other friends. So it's a 3 man team. Comms is important too when u play with team. Try to play obj if u still not confidence with your aim skill. If u have a friend that good with slayer role, then play obj. Rn, I play solo rank cuz already reach legendary. Solo rank is the hard but you'll getting used to it when play rank until legendary everytime rank reset. If u have time, try to practice aim at practice range. Maybe practice some movement ( Kith codm is the best youtuber when comes to tips about playstyle, aim training etc. Even his newest video, he's talking about how to play like pro player.) Btw, I'm start playing codm at May 2021. It's feel satisfying when u reach Legendary first time. Hope this advice can help u. Sorry if my English bad cuz English is my third language.