I can now walk and go up/downstairs without crutches, providing that I'm wearing the brace.
I went to the hospital today and the doctor said I don't have to wear the brace anymore, but I can if I want to. I'm going to have physiotherapy soon.
Unfortunately, I have knock knees, patella alta and weak muscles in general, but I hope physiotherapy will help. I have another appointment on Tuesday the 3rd of May.