I think soldering it yourself is entirely doable. Other than it being expensive, learning on a keyboard makes a lot of sense. You see, the switch pins are far enough apart that it's easy to get in there, The PCB is usually got plated through holes, and the cherry switches themselves are generally very tolerant of temperature. You can still break things, but it's much more resilient than other projects. I learned to solder on a $200 amplifier kit and it worked out well due to the good PCB, but was much harder than a KB because of the component density.
Of course, reading tutorials and thinking about it (visualization can really help you learn new things, especially ones that require finesse. It is the reason I was so good at Gymnastics when I did it) will greatly help your soldering too.