I think he just wants to use his PSR-3000 to create MIDI backing tracks, with Intros and Endings, for use with his guitar.
LarryGo to YouTube and do a search on "Yamaha PSR-3000 tutorial". There are a few out there, but I do not know how good they are. Avoid the ones that say they are for the PSR-
A3000. That is a different animal, entirely.
As a matter of fact, the PSR-3000 is so similar to any of the newer PSR-S Series models, when it comes to the "basics" that you are looking for, that you would probably find tutorials, for any of them, very useful.
Also, be sure to take a look at the "
Lessons" section, here, on the PSR-Tutorial "
Home" (non-forum) site. You will probably find more of what you are looking for there, than anywhere else.
https://psrtutorial.com/index.htmlRoy
PS
It is really not a good idea to post your email address publicly on ANY forum - even a safe, friendly one like this. You never know who else might be looking on !