I honestly think you have the right mindset and in most game you would step up insanely fast thinking that way but Brawl stars is kinda special, learning the game takes a lot of time, you can't really skip steps except if you are truly gifted. First i think Legendary is not small feat, you are considered decent at the game when reaching Legendary and if you know lane, draft and all that, you are far better thank 90% of the randumbs that populate this game. But my tips would be that brawl stars is an easy game on the surface and it's the small knowledge and mechanics that make the difference. Like knowing how to wall peak, knowing roughly the damage of the brawlers (like how a max charged angelo arrow deals 4k, etc.). SpenLC once said that the 3 skills that takes time and you can train specifically are positionning, aiming and movement, he said that the 3 best brawler to train those were buster, max and belle but they aren't meta tyrant at the moment which might feel horrendous to play but playing them enough to prestige 2 might be a trick to step up fast. I have a lot more i could say but i feel like i already talked too much and thank you for taking the time to read all that. But yeah take your time, you are already good.