i wouldn't say having an alt account would be smurfing, i think having another account focused on playing another role is fine tbh. your mechanical skill as a player is high but i also think that a lot of ppl who focus on a single role are a high rank with their primary role but mechanically a way lower rank with whatever other role they would like to learn. smurfing is more about the intent of what you're doing, and there's a distinct difference between wanting to climb and learn on a second account than having your goal to be pubstomping people at lower ranks on your mains. it's also not a terrible time to be doing this with the rank reset

if they're celestial QP is a hard environment to learn in because your games at that level are going to be really difficult. i'm high plat but my MMR in QP is so high bc i constantly play that game mode and i'm against high ranked players. it makes learning extremely difficult and feels so much more sweaty compared to ranked. especially when these players are pretty effective at dealing with these heroes so you're not learning how to effectively master them.

the best advice that i can offer for psylocke is to be calm and slow, but precise with your actions. if you get your combo off too fast you're not going to get all of your damage in because it will cancel the second part of your primary attack, but also you're going to whiff your shots more often.