Lip fillers

Could anyone here with lip fillers just give me some info on them?? Like what to do before, how to care for them after and what to expect? I’ve been contemplating getting them for about 2 years now and I just really want to make sure they will be ok for me, also do they feel wierd and fake to do things like kissing and eating? I’m just wondering if you still feel everything with them! Thanks In advance :)