Might help also to describe what you think feminism is, since it’s one of those terms that is overloaded.
I once had a physical therapist tell me she wasn’t a feminist because she thought women couldn’t be as physically capable as men when serving as soldiers, and seemed to believe feminism requires treating women exactly like men.
I told her I was a feminist because I believe in equal rights for men and women, an idea she did not seem so opposed to.
I believe in equal rights and opportunities for all, be they man, woman, in between or none of the above.
But saying (and perhaps believing) one is a feminist and actually acting like one are often two different pairs of shoes. We all are confronted with so much discrimination, with so much bias, with so much misogyny, it takes active labour to actually behave like a feminist, because no matter how you think about yourself, at some point and to some degree, all that shit we get confronted with every day will rub off on us, and we have to understand that and constantly check ourselves so that it does not influence us in our thought patterns. Constant mental garbage collection, if you want.
That is true for all kinds of discrimination, no matter what it is based on.