Keep at it! For reference, I would expect 6-9 months of consistent daily work to really change position. Should be taking all joint to loaded end range at least once daily.

In terms of heavy weight. Very subjective to what is heavy. I would say lift whatever as long as form is near perfect. So for example only snatch and OHS what you can and to what depth you can handle without sacrificing form. This could mean just the hang power snatching the bar from the knee or hip and a 1/4 or 1/2 depth OHS.

Position is key. Prioritise that and in 12 months you will not know yourself