Bridesmaids friends or family?

So immediately I'm already dreading choosing bridesmaids. I have some of the greatest friends I absolutely can not see not having as my bridal crew, it's the inlaws that are tricky. From my experience it's your closest friends and family that get picked (I've been a bridesmaid twice), however I'm trying to find a way to keep it small to just maybe 3 bridesmaids and not include future sister inlaws that way I have my support team without fake small talk. (One of the sis inlaws is super judgy and picky... we just don't click). I just don't know if I'm being selfish to my future families feelings, or if this is completely acceptable and maybe I'm saving them from the same feeling?? I just know that it's a little more stressful than it probably should when choosing my crew. 😒