I switched to Dvorak a little over a week ago and am at 35 wpm now. I did the ~two dozen lessons on "ABCD" and then went cold turkey... I felt like (prob same as other schemes) you can get enough by learning home row really well then start mixing in other keys easily. On the other hand there are some common sequences you want to get down well, for letters off the home row.
Been a long time since I meant to do it, about ten years, and as such I didn't consider Colemak or other layouts. Always been comfortable and fast enough on QWERTY. But anyway the two things I would've ignored (if I had actually been making a decision about it) are ease of learning/closeness to QWERTY (totally don't get that, for a years/decades-long investment); and hotkeys (there are too many important unix keys like U, W, A, R, J, K, T, N, P etc for this to be a factor, and at least for directional keys the changes haven't been totally insane...).
There are some interesting consequences from Dvorak that I'm sure have been well noted here, like pinky for L and S, but no big deal. But actually I have the most trouble with F and Y, swapping them essentially, and a little with I since it feels pretty common to be in the center column. On the other hand, some of the same-finger repeats I was worried about at first have turned out to be just fine, like GH, UP, UI.
Things I really like about Dvorak are the punctuation keys, common finger rolls like TH, NT, OU, CR, EA, QU, CH and sequences like GHT, etc.
So anyway, just do it! I think you can do some lessons for a few days and continuing to type normally as I did, before switching over. For answering urgent work mails/chats I just used my phone, which is a great crutch. (Interestingly I remember feeling confused once in the beginning when using QWERTY on the phone, but that seems to have passed as the keyboard muscle memory has firmed up...)
One tip I would share is to think ahead in terms of digraphs... beyond the next key you need to the next two, and also thinking beyond the space following a word to the first letter of the next. That helps the flow moving and the muscle memory of consecutive letters feels good to develop early on.
Overall it really feels good to have your hands move a lot less (I call it the "fake typing look" when I see coworkers who type Dvorak banging away at speed...)
I'm also hoping to keep some speed/accuracy at QWERTY—really refreshing to hear on this thread that others have done that as well.
(also... new here... looking forward to getting a WASD keyboard this week for fun at home and to try out a new kind of switch, think I've got the keycap colors picked out... and already have put blank keycaps on the Kinesis I use at work! One thing about this forum though... typing QWERTY is annoying as hell on Dvorak but I suppose I better get used to discussing it...)