Age and exercise related jokes aside, welcome to APUG. You will find much help here.
If you are new to folders you may also enjoy and benefit from the Rangefinder forum at rangefinderforum.com. They have a category specific to your interest with multiple threads answering these and other questions that you may not yet have encountered. That category is called 120 folders. Take a look at some of the threads and answers. You will meet more enthusiasts with questions and answers.
I ended up with a 1939 Welta Welture 6x9 with a Compur Rapid shutter and a 105mm f 4.5 Zeiss Tessar lens. Much fun/