Creatine and ACL SURGERY

I had ACL surgery about 3 weeks ago.

I’ve been lifting for about a year and a half. My main goal has been fat loss and I have made some ground with this.

During rehab I have been supping with flame out and whey.

I have no returned to the gym and am considering taking creatine.

Will they be any benefit in taking creatine now and would would recommend a waiting until I can train my legs as well.

Also where can I begin to continue my cut in order to get lean.
During surgery and post op I tried to eat clean but ate when I was hungry.

At what point will the knee no longer require the nutrients it previously did for recovery?