It's now about 5 weeks since I started my Colemak journey, so here is a progress report, and some observations on my experience, and some thoughts on Colemak and layouts in general.
For the first month I went through the tarmak stages, about one per week, until after the 3rd stage when I jumped direct to full Colemak. I found Tarmak useful for gradually adapting to the new key positions, but I didn't like to stay too long on any one level as I was concerned I would start to adapt to certain combinations (e.g. -ion) in the Tarmak 1,2 steps, only for that pattern to change again subsequently. Anyway, I've been on full Colemak now for about a week.
I have found the transition for some keys and key-combinations fairly easy, with others being very troublesome. As expected the S causes difficulty, but the R is actually OK, with the result I tend to press R a lot for both R and S. Also O seemed to bed down more easily than "I". Seems like I have a problem with distinguishing between middle and ring fingers. This is no doubt in part because I am effectively also learning to touch-type in addition to moving to colemak.
Overall, although I didn't expect it to be easy, I am finding it tougher than expected. Even though I now know the layout well, I'm still having a lot of trouble making my fingers type quickly or accurately. The brain-finger interface is the problem! I have yet to break even 20 wpm. Also I'm experiencing some pain in my right hand, but that's probably more due to the actual amount of typing - I have been doing a lot of typing tests to try to improve. Hopefully now I am using full Colemak, things will gradually start to fall into place.
I guess I'm still at the painful transition stage so this may sound unduly negative, but I do have to agree with some of the criticisms of Colemak that have been made. The most obvious one is the centre column DH issue. I find that these two letters are significantly more difficult than, say, P and L. Typing M is also pretty easy compared to H. I suppose I can forgive H though as it is in the qwerty position.
But I think the left hand would be improved by the switch D>P>G. The common D would then be above T where it would be easier to type. It would also have the bonus advantage than G reverts to its familiar qwerty position.
Going on to a more general criticism of optimized layouts, I feel too much emphasis has been placed on trying to get them as optimal as possible without giving sufficient weight to learning difficulty. Since we live in a world dominated by Qwerty, alternative layouts looking to be successful need to be able to show a bit of leg to potential switchers. Colemak does this moderately well with its 10 letters unchanged and good shortcut retention, and the big advantage of Colemak over Dvorak is its easier transition from qwerty. But it makes me think moving S was a tactical mistake in this regard, even if it is marginally more efficient in its new position.
Meanwhile the Workman layout solves the centre column issue but at the expense of moving further away from qwerty. The layout that does best in this regard is Norman. All these modern optimized layouts score close to each other on most of the common metrics, but Norman emphasis on re-usable qwerty skills where possible is in my view the best approach.
So why not pick Norman? Well, it was my runner-up. The fact the Colemak is more widely available and supported won the day. Norman is still very new. Colemak is the layout most likely to break out into public awareness. The fact that it available by default on Mac OS and Android is very significant.
So I decided that despite the more difficult learning curve, it would be worthwhile in the end, and so I am still committed to learning Colemak. I hope I will be able to adapt in the coming few weeks and I am still hoping that will be the case. As they say, no pain, no gain! I'll try to post occasional progress updates to let you know how it goes...
Using Colemak-DH with Seniply.