Well basically it really is up to you in the end, as you've got to make the effort to make it happen, hehe.
I know you said at the start you'd "love to learn how to properly touch type" - why is this. Perhaps you could explain more. Was it something you've always wanted to do?
I can go from personal experience and wanting to touch type was always something I had wanted to do from junior school. Only problem is I didn't take action after along time, only when I felt the need to do it because as I've said I'd acquired a mechanical keyboard, felt rather indifferent to it (was planning to return it), and essentially to justify it's expense (£120 a lot of money for a keyboard) I learned to touch type in QWERTY, and 'why not?' since virtually all UK keyboards are in this layout I thought.
It was my obsession of having things optimized and questioning of why things happen this way that led me to researching different layouts, I intended to go for Dvorak because I heard of that one earlier, plus it seems to be integrated within MS Windows but settled on Colemak on the end. Reasons being it is similar to qwerty in terms of layout and not much keys moved plus from that link I showed you earlier, it seemed to be more efficient at the time. In terms of 'carrying' the layout with me is no trouble, I can easily switch using portable apps on a mem stick to Colemak easily and have easily integrated it myself using MS Keyboard Layout Creator 1.4 to all my home computers.
Now the question whether or not you would want to learn to touch type in another layout is up to your circumstances.
Do you find yourself on other computers alot? If so, qwerty would seem obvious since essentially this is the default keyboard and you can go switch easily between them. But you can also consider the possibility of switching between home-Colemak and work-QWERTY, people over on the colemak forums do this successfully.
Do you find yourself on your personal computers more? If so, then it might be worth it since there would be less 'hassle' (doesn't take long) for switching the layout small times per week. So good consideration.
If you asked me do I think it was worth learning to touch type I would say yes, in my opinion it makes you truly appreciate the mechanical keyboard and has been a learning phase, something I would have never thought about before in terms of keyboard types/feelings/manufacturers. But that was me, although I have been 'typing' many years previously, I did not develop non-standard 'touch typing' I had to peek now and then, lol. So maybe the benefit for you would not be worth it since from what you have written seems to be working fine for you. As I suggested earlier on this post maybe if you can tell us more about your goals and what you want to achieve by 'proper' touch typing we can help you further?
But whatever you do, you have to remember it takes time and effort (as with everything in life, unfortunately), and if you are not willing to put the time and effort in then maybe it's not worth it for you. Anyway, hope this helps.