Hi Sharon
I guess that means you have passed? I missed that, but I've seen lots of your other posts and I knew you were getting ready to sit for the exam, so congratulations!
Yes, study sessions count as giving back, along with creating content, giving a presentation, working as a practitioner etc. The CCR handbook has examples of what you can do that counts towards giving back PDUs:
www.pmi.org/-/media/pmi/documents/public...rements-handbook.pdf
Yes, you can earn them 'early'. As long as you get 60 in the three year period, you're good.