Just to pre warn you they are extremely fast and if you move your eyes away for one second they will be gone out of sight before you realise so dont keep the lid off and look away.
That rub is far too big also as above a 9ltr is more than enough
Use aspen as bedding or kitchen towel.
You dont know how to feed a snake? how much have you researched before you get it? You need to feed using long tongs and if possible encourage the snake to strike feed.