Let me quickly add this in addition to all the several links to reading materials you will get, beware of anyone who sends you PM for business transactions. In most cases they're scammers.

Just this first link in your post that leads to several threads is enough reading material to last OP a whole year if they're truly serious in learning about Bitcoin and the entire crypto space. We just hope OP returns to peruse what has been dropped here for them because most times newbies ask questions and then disappear.