Help needed for backing track!!!

Hi!
I was wondering if there is anyway to make a ギター backing track on your phone, since I can't play any instruments!

ギター would be Acoustic または ベース (I think) maybe electric ギター but I highly doubt it!

I'm entering a talent contest with this song and have 5 weeks to get a backing track of some sort for it!

Any help would be awesome thank you!