This is where I do my learning I have Guitar Pro running with the computer headphone jacks plugged into the input on my Digitech effects pedal. With this set up I can mute the part I'm playing adjust the Digitech for the sound and bingo off I go If. I can slow the music and TAB down to a easy level and slowly speed it up in guitar pro. If I were you I would get the bass Digitech BP90 effects pedal, these things are unreal they have effects, amp and cabinet simulators and tuner all for around 100 bucks just wish I had this set up when I was younger
video of what you the BP90 can do
PS forgot to mention the BP90 has a build in drum machine to, and the video is not in English by hey music is music in any language