Are there any restrictions I should pay attention to to reply and post? what is the maximum and minimum I should do in a day?
Since you're new here, you should read this so you'll have ideas about the rules of this forum and how to earn bitcoins.
https://bitcointalk.org/index.php?topic=1689727.0https://bitcointalk.org/index.php?topic=1629118.0That is just the basic, I would suggest that you read the threads here specially in the BEGINNERS & HELP threads. I guess you can find the answers to your questions in the threads. Hope it helps.