I'm 55 now. All natural except for creatine for those who think even that is cheating. I've hit personal bests in 1RM in almost all areas over the last year or so. I'm at the highest level in my life on core strength, I got 25 dragon flags in one minute. I am still running sprints for an hour...
It's not the same everywhere, but in Florida you must have a Bachelors Degree and be licensed by the state to give dietary advise. You can work under someone else's license. You can also discuss how you eat, and clients can decide to follow or not.
That said, I think you have a good idea...
Electrician is good, but do you want to know what is going to be awesome? Learn new high tech electric motors. They are going to be huge in the auto and trucking industries soon. Being ready to repair and maintain them I think would be a very comfortable place to be.
I had ok abs my whole life. I've done ridiculous reps (1600 sit-ups nonstop) before being introduced to weighted abs and more extreme abs exercises, that was when I was about 40. I've been doing abs like that ever since because that is what increased my ab muscle thickness.
One of the first...
Ok, I think I know the reason the link doesn't work and I also can't tell the site to you. Just search: "hyperthyroidism? Can't gain weight" and I'm sure you'll find it.
Ok, hyperthyroidism was one guess as to the cause. It's going to be difficult for you to change your body type. Maybe someone on here is the same as you and can tell you how they are dealing with it. I suspect it's going to be an ongoing battle.