Originally Posted by
rukuchimera
At some point I disconnected the cable, and I can't get it back on properly so that I can effectively change gears. I have to push the lever in far too much to get to second and it's impossible to get to third. ... I've watched every video but they don't go into enough depth regarding the proper way to put on the wire.
Sometimes the routing of the wire on front derailleurs can be a bit confusing. I've been caught out a few times myself. Are you able to post a photo? Or maybe a link to a photo?
Is there a bike shop nearby? Maybe run the bike to the shop for a quick fix.