I am working on a steeked sweater for the first time. I used Ingrids sticky above, and was able to ask her some questions as I needed. That was very helpful. I'm making a baby sweater of my own design by this method. I started it quite a while ago and then got side tracked on other knitting and got back to it just yesterday. I did steeks for the armholes and for a cardigan opening. I have the sleeves in and yesterday cut the front steek and am working on the neckband and the front bands.
I sewed both sides of the centers by hand instead of by machine (it says in the sticky where I found directions for doing it that way, I can't remember the name right now) and that has worked fine. I'll have it finished soon.
This is not such a hard technique, and really has some advantages when doing Fair Isle. Sewing the steeks by machine would make the process much faster, but I didn't know if my machine would do a good job so I did it the slow way.
Go for it.