You shift click on the block and place it where you want it
You have to right click
Maybe you're not using a pick to mine. You need to use a pick.
You need to have the block selected then right click to place it in front of you, to place it underneath you jump (space bar) then right click fast
YES
yes
Redstone blocks? You need an iron pickaxe.
Redstone blocks? You need an iron pickaxe.
keep it in a chest
infinity health
keep it in a chest
you can find it in a chest