Mirroring mesh problems

I’m new to Blender and I am modeling a simple base player. I’m mirroring the right foot to make the left but so far i can only get the modifier to duplicate using the body as a mirror and it stays joined to the other foot its being mirrored off of and I need it as its own entity.
I posted this problem on another post but then realized the last post on it was in January.
Thanks for the help in advance.

Your description is a bit confusing. It appears you don’t have your character all in one piece, maybe that’s why the modifier isn’t working…

As ptb said, it sounds confusing, but another thing I can think of is you have Do clipping pressed.