Please take some time to read the SR wiki in its entirety, here is the link: https://dkn255hz262ypmii.onion.to/wiki/index.php?title=Main_Page I would also recommend you invest plenty of time reading these forums, lots of information here on how to get set up and navigate this site safely. Buying bitcoins will depend a lot of where you are, have a read and report back with any unanswered questions you may have.