What can I do till the neetpg counselling actually starts?

I am 25 yr old male from Mumbai. I got decent rank in neetpg 24 and will get specialty of my choice (i.e. ophthalmology) in a decent college. Idk what to do in the mean time. I had taken a drop year to study for neetpg after internship and it has been more than 18 months that i have just sat around at my house. Are there any health related courses that I can pursue in the mean time to keep my mind stimulated/occupied? Should I do something related to ophthalmology and if so, what?