I'm in a similar situation, working for a very small company. Over the 6 months or so that I've been learning KiCAD, I laid out 3 boards that are going into commercial products. One is a fairly dense mix of about 60 SMT and THD components. The other two are pretty simple boards - I probably could have completed them almost as fast using black tape on mylar (though creating Gerbers would have been problematical).
I don't consider myself a PCB designer. Board layout has been a necessary, but ancillary, task to my other engineering responsibilities. I've created about 25 - 30 boards over the last 15 years, and made changes to at least that many existing layouts, using half a dozen commercial layout programs. KiCAD seems to have all the functions and features I've ever used, as well as some advanced features I'll probably never have a need for. I've struggled more with the transition to KiCAD than I recall struggling with other programs. (Some of that may be a symptom of the "old dogs and new tricks" effect.) Compared to Altium's P-CAD - the last program I used extensively - KiCAD seems able to produce comparable results with about the same, or slightly more, effort. KiCAD seems less intuitive, much poorer documented, and the library system is less comprehensible and more unwieldy. But every month or so I discover something that KiCAD can do with less effort than the procedures I've been using. Now, if I could only remember all those tricks and shortcuts the next time I need them!
Transitioning an existing layout from one EDA program to another has been a problem since the inception of the industry back in the early 1980's. (Every company not only has its own proprietary file formats, but there doesn't even seem to be agreement on what information is saved in the files.) There are companies that will perform the conversions between the most popular packages . . . for a fee, of course. I have redrawn the board on the few occasions when a design had to be moved to another program. With printouts of the Gerber layers, and a listing of the component placement locations, it's not as tedious as you fear.