I'm not trying to be harsh on you because you are a new member but you do not really need a tutorial or an explanation to join bounties and airdrops, you just need to get acquainted with the forum and with the way things work in here and very soon you will be able to join a bounty campaign if that is what you want, but do not force yourself take your time, it is not like the bounties are going to end, there is always a new bounty coming every day.