you've got it easy, when I first came to a jiujitsu class just to watch(at 14 btw) the instructor said "yeah take your shoes off and come onto the mat, see how you like it" I was doing warm ups in jeans and a polo shirt lol.
To be honest with you, the only people who get treated like anything else but family in the bjj community are newbies who come in with an "I can kick anyone's ass and I already know everything" attitude (we wreck them so they won't come back) and people from other gyms, but that's just a friendly rivalry thing.
As long as you come into the gym with a little humility and a willingness to learn people will do everything they can to help you. Trust me, if you like it then after about 3 months or so the gym will become your other home and your training partners will become your other family.
To be honest with you, the only people who get treated like anything else but family in the bjj community are newbies who come in with an "I can kick anyone's ass and I already know everything" attitude (we wreck them so they won't come back) and people from other gyms, but that's just a friendly rivalry thing.
As long as you come into the gym with a little humility and a willingness to learn people will do everything they can to help you. Trust me, if you like it then after about 3 months or so the gym will become your other home and your training partners will become your other family.