I love clawhammer but just can't do it, and I'm leaving that now because when I try to learn on too many different fronts , I get nowhere. So just for now I'm concentrating on Formby-style. That split-stroke takes a lot of practice, and doing it fast (much faster than me) is something else again! But I started having a go at it in about May, I suppose, when I got my Slingerland banjo-uke fit to play. And working harder at it it since September, I'd say. Learned it from videos.... there are several good ones on Youtube. Have you looked at my blog? (below) I sort of document my progress on there... if you scroll down to the bottom of the page to the label-cloud, and click "split-stroke", you'll see the posts I've done about it - and you'll see a very good tuition video by Matthew Richards, a young stalwart of the GFS. Mike Warren (another GFS member) also teaches it very well - just search Youtube for Mike Warren split-stroke.
Now, if you're on facebook, Mike Warren does a group called "Learn Ukulele for Free" on which he posts stuff, including his own youtube videos. He did one on the "Shake" the other day, which is a variation on the split-stroke - that's where I learned it.
What really frustrated me in November was that although I could do the split-stroke, I couldn't incorporate it into a "solo" - and that's where I did have some one-to-one help from a kind GFS member. I talked about that on the blog. You might find it interesting! Do you have a banjo-uke? The banjo-uke and Formby-style were made for each other. In the Formby songs, everyone is just waiting for the instrumental solo - that's what it's all about. I'm in the UK and I go to the Formby meetings in Blackpool. You don't say where you are - if you're in the states, two big American Formby-style players on this forum are John Bianchi (Mrjnobianchi) and Johnny Foodstamp. I post their stuff on my blog, too. I sometimes have a go in the "Seasons" contests on here, just to take part. I've done a shortened version of When I'm Cleaning Windows for the current one, 47th season - it's got my attempt at a very basic solo at the end.
Phew. That's enough! Thanks for your interest - I really appreciate it!