Hi Alnia! I got my super fantastic betas right here on good ol' Query Tracker! I have 2 and I shared one novel with them after I had finished it, revised it, and queried it. My second novel I showed them from day one and they helped whipped it into shape even from first draft! So with betas, you just do what you are comfortable with. Try to find someone who writes in your genre. Some people wont show a page until they think its perfect. To me, having them help from the start just saved me hours and hours of work. Others are afraid to let the 'crappy first draft' out there. Not me! I say, tell me what sucks so I can fix it!