When I was a newbie, no one teaches me on how to join bounty, I just made an effort on my own educating myself to understand.
Actually if you look at the bounty section,
https://bitcointalk.org/index.php?board=238.0.. you can find all the requirements to participate.
I also suggest you join a facebook group from our kabayans if you can find so you can just ask if you have some trouble understanding the procedure.
I won't suggest joining in a facebook group, halos lahat ng naka post doon mga HYIP / Investment Scam or mga referrals, sa dami kung sinalihan na fb group dati na related sa crpytocurrency puro useless ang mga naka posts.