I didn't deliberately do it after divorce, it just sort of happened naturally.
I didn't have to second guess what I was eating, drinking, wearing, watching, saying etc. So I naturally became more of my real self, if that makes sense !
It took a while to figure it out, but I do loads more sport now (road and mountain biking and running, even a bit of horse riding now that I haven't done for decades), wear floaty things sometimes that he definitely wouldn't have approved of, and the list goes on.
I think it takes a while to work out what's just a rebellion against them, versus finding your true self, but in my case it just happened in its own time.
Go for it - do a hair cut change - if you don't like it, it'll grow back. Try some different clothes. Eat different stuff. Sign up to a sports club or whatever. Now it's only up to you whether you like it or not, it's a liberating feeling!