Can you offer any advice for making friends mid-year at college?

I’m on a temporary medical leave from college while I get surgery, and my goal was to be healed up and ready to go back for the beginning of the year, but that is starting to look very unlikely, and it seems I will be returning mid-year, either in October or January (quarter schedule).

From the small amount of college I have experienced, I know that at the beginning of the year, most freshmen are actively pushing themselves out of their comfort zones to be friendly and meet new people. But after a few weeks, they have made friends, they’re content, and most stop actively seeking new buddies. I’m concerned that by arriving midyear, it’s going to be a lot harder for me to make friends. Does anyone have any similar experiences to share, or if not, any advice on what I can do to make friends?