I found a couple of Agfa Isolette folders on ebay quite cheaply [under fifty USD]. Medium format for the back pocket of your jeans. The focus is based on the guess system, but I got the hang of that quickly enough.
I've also got an Agfa Isola, a fifties model point and shoot MF, considered a toy camera as is the Holga, but far better build quality and no light leaks.
I've got a Lubitel 166 and like it, but I collect Russian cameras so I'm biased.
Keep us posted as your adventure in MF unfolds.