Mac Migration

I migrated from my 2009 iMac to a newly purchased iMac. During the process I was asked if I wanted to create different users - one for the old iMac and one for the new (or something along those lines).

I do not like the result.

Is it possible to redo the migration?

If the answer is yes but only if I wipe the new computer, it’ll be problematic for several reasons. For one, I got the hybrid fusion drive (which I regret) so the steps I was sent by the support folk didn’t work. Most importantly I’ve physical disabilities that prevent me from being able to function long enough to work with Apple’s support team, else I’d call them again.

Basically I’m hoping to hear that performing the migration over again will resolve my issue.

Thank you!