[WSCB]

I'd say your best bet is picking a setup (like askl, qwop, etc.) and jumping in. Use different mods and files to keep playing fun and challenging while you are getting used to the new style. A regular laptop/desktop keyboard should suffice.

Started out one-handed for a few years / transitioned to split for this account a few years ago (one finger left, three fingers right (gnj,)) and started learning spread (qwp[) on a separate account this year. I could barely play songs around 30-50 (normal is 80s to low 90s). Now I'm starting to break into the 70s to 80s range - it was quick progress without a terrible amount of effort, but standards may vary on the player...

Don't put too much thought into it. I think there will be great return if you make the transition to spread soon and persevere, despite initial awkwardness.