Hi OrganicAngel
I have been hypothyroid now for nearly 15 years, after having Hashimoto's Thyroiditis. You're lucky they found it anyway, took them years to dx mine, they kept saying it was psychological.
The medication definitely helps & you will have more energy.
Carl Lewis, the sprinter, is hypothyroid, so it's obvious that one can function.
Some people need T3 replacement as well as T4, but the blood tests

will reveal this. I have many journal articles on this illness & if I can help PM me anytime.
It's a shock, but an accurate dx is the start of the improvement.