Ponygirl’s advice is good. There are a ton of posts and articles here at Panty Hog to read up on how to get started.
As far as legality; if you are genuinely concerned with this consult a licensed attorney knowledgeable with the local laws in your area instead of asking for legal advice from anyone on an Internet forum. This is a panty fetish site, not a law firm. Think about it; how would anyone here know the laws in your jurisdiction when they don’t even know what country you are from?
Laws vary from city to city in the same county and our members are from all over the world. Are you really prepared to take legal advice regarding the laws in someplace, Kansas from a motorcycle mechanic in Singapore?
-PK