Changing Emails; Curious if any problems will arise.

I'll just copy it from my reddit post that redirected me to here, and I am sorry if it is too long, but here goes:

So for a bit of backstory and context for this question, a long time ago when I was a little kid and got an xbox 360, my mom made her account with her email and made my account with my email and let me use her account to buy games and such, and I even changed
the gamertag of her account which i'll be calling SuperEpicJake (which is still under my mom's email. Then there's MY emails account, which is a randomly generated xbox live name which I'll call WackySolid (if it wasn't clear, both not actually the gamertags).
So now that I have my own accounts on many things and I'm going back to using Microsoft for some things like minecraft bedrock/earth, I'd like to somehow make my moms account with all of the games I bought and the friends list etc. onto WackySolid, or just
onto my email. I currently do use SuperEpicJake, but obviously I'd like to use an email with my account, but the thing is: WackySolid is also linked to my Microsoft account which has my computer linked up to it (the one I am using to write this right now)
and I'm hoping it wouldn't cause any problems if I moved WackySolid to my second email that I use for second accounts, and then moved my moms account to my main email. Would it cause any problems? Would I be able to use it properly? If you need more info,
just ask and I can let you know. I'm just asking if it's complicated or if any problems would arise. I hope I'm not asking too much or a too confusing question.

TL;DR I want to switch me and my moms accounts basically, but my computer is linked up sort of to my microsoft account referred to here as "WackySolid", so I am wondering if switching the email of it to some email I don't use would mess it up, or if switching
my moms account to my email would make some bad problems happen. Or if it's just possible to transfer friends and game purchases to another account

:)