Hi @Prakem, welcome to the treehouse - and good question!
From what I recall, the welcome robot should have left you a message as soon as your account was created here, and by following the steps they ask you to go, it will help you navigate the various buttons, how to post, etc. I’ve added a screenshot just below of mine 
Otherwise, we have a treehouse index of our most useful / asked about pages which you can find here: Treehouse Index
The search button in the top right is also very useful when looking for specific key words, or topics. Please reach feel to post any questions or reach out anytime! It’s super awesome to have you here 
