welcome to  site. many are nice and friendly but as in all chat room  we get a  number whom seek to annoy or cause issues.  you will get to know these given time.
you probably feel unsure at moment as new and not chatted to anybody.  that will change as soon as you say hi in main room and throw in 2pence worth of comment  or just hello.
it can take a while before you sort out  good form bad .  private messages  form men are often to  be expected sadly and  nearly  all are unwanted .. sure you can understand why.
try and chat to  females in room  first. they   often know whom to  avoid and whom will chat  freely and  nicely. good luck .do hope you enjoy it. failing that get back to me and i  will suggest another chat  site.