There are also 35mm pinhole available ;)
B/W home development is a easy thing.
I see you're located in Vienna ... there Lomography has a branch and a development center they do 120/220, if you are in good luck you can get you there a pinhole Holga 120, or a Diana pinhole for a few €.
I think CeWe runs also a development center in Austria (the develop for drugstores, etc.) and they also do 120/220, very cheap.