Hello,
Welcome to the forum.
As the others said, tell us a bit more about yourself so we can help pick a product that may work for you. Take some time to read the sticky’s at the top of the mens forum. There is a lot of good info in there. Here are a few threads that will explain a lot. Most of your initial questions are answered in these threads.
The Snook’s big book o’ pheros for rookies ( 1 2 3 … Last Page)
Basic Noob Phero Bootcamp (Basic Noob Phero Bootcamp) ( 1 2 3 … Last Page)
Again, welcome