Things went slowly in the last couple of weeks, but it only needs a seatpost now. :) Excuse the hideous photo.
Went with a Deore LX FD-M563 front derailleur in the end, as my DX was seized and pretty much unusable on the high gear. This one's buttery smooth and even matches the color scheme of the bike better. :)
Also mom insisted on bar tape instead of a grips, so I went with that.
This build definitely turned out to be more challanging than I initially thought it'd be, but it was fun, entertaining and educating nonetheless.