u/Impressive_Orange467

I've been playing for 9 years. I started quite young, and wasn't dedicated at all (as most children are), and I did group sessions the whole time, with my teacher mostly making me do timepass once I was roughly 7 years in and above the other students level. I've only recently started practicing properly, trying to balance it with studies and other stuff. I'm currently doing saint saens swan, and oskar rieding concerto in b minor, both of which I can play decently to well depending on the day. I can't do vibrato and am fairly uncomfortable with shifting, though I can manage if I practice the passage enough, plus my intonation is not 100%. I've been feeling really behind, how can I catch up technically?