Basic Audacity 2.1.0 Help For Beginner Please.

I need to edit & mix two backing tracks. Audacity seems the way to go but, being completely computer illiterate, I’m not having much luck. Does anyone know if there is a service - or someone - I can pay to do this for me?

There are several tutorials in the manual that you may find useful to get you started: http://manual.audacityteam.org/o/man/tutorials.html