Friend issues

I’m a sophomore in high school and I started at a new school 4 days ago, I’m a really shy person and don’t really know how to start convos but I talked to this other new girl on the first day of school and she just won’t leave me alone now.

she hates the school and everything in it and she’s not so fun too while I’m really fine with the school and still in the adapting process

Another new girl talked to me yesterday and she also is acting like the other girl and I’m really uncomfortable

They’re good people and all but they’ve got really bad vibes and they’re not really my type and I just don’t know how to stop hanging out with them because they really just follow me everywhere and I really want to get to know other people

I don’t want to hurt their feelings or anything and I’m just being nice so can anyone give me advice on what to do, Ik I might sound rude but I really need advice .