I haven't used that iron, but i have used a few low cost similar chinese model's. And that is definitely way ahead of any non controllable mains soldering iron, and should be fine if your not going to be doing a lot of soldering. I just got my first Hakko iron a couple months ago, a hakko FX888D for $80 USD. But i do a lot of electronics repair and for just a few projects now and then i think that iron would be great.
As for solder, if you can try to get lead solder, for longevity and ease of use its way better, I use a 60% tin 40% lead solder from Kester. But if you cant get any leaded solder there id still say try to go with a brand like Kester or Multi Core, using good quality rosin core flux solder is even more important for lead free solder. And make sure you find out what the recommended temperature is for the solder you use, required temp for lead free is a bit higher.
Im Actually building my first keyboard but i do have a fair amount of soldering experience.