hope it works out.
well try not to be too hard on yourself. i know it can be hard, but try to congratulate yourself more for the little things.
eg: if i do my dishes, i consider that a success!
just try to have fun with it.
which the "songs" can actually help with.
as its a 3 minute thing, that at first may be hard work.
but can be grasped fairly quickly (depending on the song, some 3 chord guitar noodle) and gives you a recognisable sense of accomplishment.
you can learn all the scales, and at the end of it, youll have a major and minor scale, at different postions is all.
a song is a full project in one little bitesize chunk, that as i mentioned earlier, is better to pull out as a party trick than a few scales.
but most of all, don't beat yourself up too much. it takes time, you obviously have the interest, but lack the confidence it seems to just have fun with it.