The easiest way, honestly, is to either commit to it and work the fuck out of it, or change the thing that's holding you back. You can take the existing guitar and have it setup upside down (it will need a new nut unless it's a Floyd Rose locking nut) so you have an upside-down guitar strung correctly for your orientation, or you can sell it and buy a true lefty (which would probably be much more comfortable).
You wouldn't be going back to square one, you'd just have a few months where you had to get used to doing everything opposite and then you'd be used to it.
Ultimately, it's a "shit or get off the pot" moment for you - either accept the status quo or make a radical-but-do-able change. Best of luck, either way.