how do.

6 months? try 2 years!! played my first game of football a month ago two years after tearing my acl. long time.

did you have patellar tendon or hamstring graft?

when you say the knee is swollen, to what extent? if you sit with your legs out and knees straight does it look obviously swollen compared to the other knee? or is it just when ithe knees a little bit bent that you notice it? small amounts of swelling are normal and if its not blowing up on you dont worry about it too much.

vmo size? if your strenght is about equal size isnt really an issue. you can have strength assessed by isokinetics if you'd like to go into it in more detail. very important not to focus all strength trainin on quads. hamstrings are just as important, especially if it was a hams graft. adductors and hip stabilisers are very important to strengthen aswell.

just as important also is balance re-education for the knee and body in general. loads and loads of proprioception exercises.

if your thinking about going back competitively soon you must be training now yea? how is it going? are you back at full pace? any discomfort/pain, you dont mention any?