nice, hahaha. i was asleep by then!
you can do it, you know! self-esteem is just something you gotta work at, like anything else. just takes some searching and practice.
if you’re experienced in construction there are lots of sidesteps you can take to get oaway from the manual side of things, and into more of a foreman, safety, educator or planning -type role. are you doing any adult education right now? not just classroom reading and writing stuff (zzz zzz), but also interpersonal stuff like team leading skills, conflict resolution, etc and more practical stuff like reading blueprints and whatnot?
my old man is a truck mechanic who has screwed up his hands from lying upside down fiddling about with giant nuts and bolts for years, and he really struggles with carpal tunnel sometimes- he’s in the process of changing from being an old grease monkey to a managerial role- teaching new mechanics how to do things old-school, problem-solving and fixing big screw ups that leave them headscratching, performing tests, signing tickboxes for safety checks, etc…. and he didn’t finish highschool- so it is doable, you just gotta keep plugging away at it and find your niche. 
sometimes the most unlikely routes will take you to a great place, and those ‘negative’ experiences can become hugely positive ones instead- for example:
who would be better to work with a group of wayward teenage boys who have fallen out of the good crowd, and into naughtiness like crime? boys who need to learn a practical trade and get themselves back on the rails. someone who has a bunch of degrees and excels at paperwork- but who has never experienced failure, or known how it feels to be totally lost and pissed off at the world? or someone who has been where they are, understands their challenges, and can totally relate and reach them on their own level- someone who can say “i sorted my messed up sh!t out at 48, with years of problems under my belt, AND ADHD- now don’t go telling me you can’t sort yours out, lads!?
you no doubt have a bunch of skills and strengths that you don’t even realise yet, or that are just waiting to be teased out from just under the surface. get …um…. teasing. 