Welcome to Steem @harry333.
Do read A thumb rule for steemit minnows - 50:100:200:25 for starter tips.
Spend time reading Steem Blue Paper to know how Steem blockchian works and if you still have any queries ask them on our Ask me anything about Steemit post and we will try to answer that.
All the Best!!!
Thanks, but I already know a bit how the Blockchain works, I know that your're a BOT ;)