>>3327158You can either get an SLR or a TLR. The old Mamiya C2 series are pretty cheap and surprisingly sharp. The Pentax 645 and Mamiya 645 are both popular and (relatively) inexpensive SLRs. My first 120 camera was a Holga, actually (this was before it was memed out) and right afterwards I got myself a Mamiya C220.
The SLR will feel more natural for you (assuming you've been using one in 35mm or digital) but the TLR is going to be less expensive. Don't fall for the Rollei meme. They're meh-tier when you actually use them due to the limits of their focusing abilities.
Pic is a scan of a print I made from Fuji Acros 100 (reeee they canceled it) and took with my C220.