Don't worry about that... nothing is really hard if you learn how to use it, you just need to understand how to import your files how to open a new sequence and how to cut and delete clips and add a music these steps are so simple in premiere.
Premiere pro is not complicated and there's plenty of tutorials online where you can learn how to do every single thing in premiere pro and we're always here to help.
Premiere has a steep learning curve. There are a lot of features you might not even use.
Its aimed at the professional and the advanced non-professional user.
Rush is simple to use, edit your content and upload.
Rush can be used on computer or phone.
As for tutorials online: there is a lot of rubbish out there. And as new user you have no idea what is correct and what is not. If you are serious about Premiere Pro take a subscription at Linkedin Learn.