Start with what you can change. Dig deep into nutrition. Get weights and put muscle on ,,having strength is a brilliant way to feel good and very practical .
Be very careful of the EGO when the muscles and strength arive, the fact your studying neuroscience ,youl be aware of motivation problems if low in dopamine .spending time on healing any trauma from childhood is a must ,,,as I said on the other thread , be very careful feeding the demon of resentment and envy..
Respect to you.