If you never worked on an EM I would start w/a single player. These come to mind:
Hearts and Spades
Lucky Hand
Ship Ahoy
Out of those 3 I really like Lucky Hand but all fun and AAB.
Since you have already played EM’s then you know the difference in game play comparison to Electronic...much slower. I found EM’s much easier to work on but that’s what I started with a long time ago.
Lots to read on repair on line for education and familiarization. I’m sure others will chime in. Enjoy.