I just moved back to Salem with my grandmama we moved into the old family house and soon in going to be the leader of my circle but feel like it shouldn't be me but my grandmama said ive got more experience then the others I feel unwelcome in this circle like I need to leave now or I may get hurt any advice?
It can be intimidating to take a position of responsibility among a group of new people although I would personally suggest that the leader of any coven, circle (or whatever you want to call it) should in fact not be the most experienced but the one most able to bring them together. In all the feeling of paranoia you're having over the circle is just that as very few people would actually attack someone just because they don't like them but if you don't feel ready for it then don't do it yet.
If the group is hostile to you then you ultimately have two options, win them over or back down. Typically any groups I've been have elected their leaders and I would recommend to your grandmother that such a system may be a better way forward than just the one with the most years practicing.
You should be cautious. Whenever I get a bad feeling, something bad happens if I continue on that path. But, yes it is very unlikely someone would hurt you because of that. (Thats for NORMAL people though. I don't have a coven.)