I sent you 3 BURST: 1 for setting your 'account name', and getting the 'public key'. The second is for reward assignment. The third BURST is for covering the transaction fee for paying me back when you get your first payout from the pool.

Good luck!
Hold on, how do I set account name and public key?

So far, I've used:
online wallet service, I got my wallet working just fine (free)
plotter (free)
reward assignment to the pool (paid 1 BURST)
miner (free)
What did I missed? I've seen some videos on YT and read, that nowadays I don't need to pay multiple times to set up different things, but I am not sure
