Hey Matthew, nice bike, welcome to 101 world. The engine number is indeed 1930, looks right for rear fender, which was hinged in 1930. You may also have a frame number on the left rear wheel frame lug, the factory started numbering frames late 1930.
Don't rush anything. First up, I would make a plan to get the bike running as is, run thru all the fork links, controls and wheels. Even with a complete top draw restoration, I always recommend gettting the bike complete and up and running, and indeed run in, before any decisions are made about painting and plating. That way you can avoid damaging any new finishes while you fettle the bike, and you may well find that you are happier riding it that way, rather than burning thru thousands of dollars in shiny parts and paint and then being too scared to ride it.
Are you likely to be able to get to Oley AMCA meet this weekend ? Will be a few 101s and club members there.
Work thru each item at a time, feel free to ask as much as you need on here, its a great technical resource, and club members will be able to recommend current suppliers etc.
Feel free to call me any time 860-482-9215 (landline so may get answerphone), am in nw Connecticut. You would be most welcome to bring the bike up to the shop for a 1 day 101 orientation.