At this point you need to have the ICO's signature added to your profile. They will have a google spreadsheet to track participants, once your name shows up there then you are in.
Continue to post as normal, but remember don't shitpost. You will get stakes every week, or maybe longer. The bounty managers have a TON of posts to check so they run behind schedule a bit sometimes. Remember you spamming them asking "where are my stakes" isn't helping the situation.
Once the bounty is over wait for the bounty manager to give the okay for you to remove the signature from your profile. Usually if its not an ETH token this is also when you will supply a wallet address of sorts.
Hope this helps.
This basically all it takes to participate in signature campaigns, however as a newbie, id encourage you to continue working on yor account and climbe up the membership ladder for you to qualify for most campaigns