When thyroid improves everything else will. I would get on pine pollen right away which has contains androsterone and DHEA. Both of which are pro-metabolic and are in amounts where it would help upregulate endogenous production. Make sure your cholesterol is high enough so thyroid has raw material.
Also, make sure minerals are good especially magnesium and selenium along with all of the fat soluble vitamins.
When your thyroid improves the adrenals will along with DHEA and T will go up. Resistance exercise should help as it increases thyroid conversion but overdoing it will increase cortisol and actually cause the opposite so don't over train and keep the sets short.