How to nurse a small injury?

What do you do to support small injuries? This is my first and I’m unsure what kind of practices are normal to do.

I have been so clumsy the last 2 weeks.. 2 runs ago I rolled my ankle 3 times. I didn’t twist my ankle but definitely pulled a small muscle on the outside of it.

I went on another small run today and I feel it slightly worse, even though it didn’t hurt during the run itself.

On top of that, I am having some knee pain that I don’t quite know where it is coming from.. I just bought new running shoes, too! I got the hoka bondi 9 because I have high arch feet and they seemed to have good support? How do you target where these pains are coming from (i.e what you did to get them)?

Help me get better!