Plugin to "Step Through" Midi Sequence Note By Note?

Hello all, I have a couple of particularly difficult Hammond solos to play live in my cover band. I’m working on them, but so far, they are beyond my skill level (Boston’s “Smokin’” is one). I’m wondering if there is a plugin or application where I could record a midi sequence of the solo beforehand, then trigger that sequence by note presses on the keyboard until I can teach my muscle memory to hit all the correct notes? We don’t play to a click track, so a backing track is not an option.

Thanks for any knowledge!

I do not understand what a step sequencer should help.
A solo does not only exist of equal for example 8th notes you can step through.