Oh boy are you in for a treat. Last year at this time I was busy researching FW's before I purchased my 222K.
1. FW 221, The Perfect Portable by Nancy Johnson-Srebo, Amazon had best price I could find.
2. Those Fabulous Featherweight's by Dave McCallum, has website.
3. ISMACS website and Graham Forsdyke.
I enjoyed the research like it was a preparation for baby birth or a new puppy. Have fun, the more you read the more you will want to know.