It is not ordained religiously to have a hobby. Hobbies are personal choices. You do not have to have a hobby; it is totally up to you. It is good on a personal level to have good hobbies that you can benefit from. It will benefit you indeed after life if it was goodness to people.

 

Looking for a spouse is great but you must tell of your medical conditions so you will not be deceiving the spouse or her family. If they accept you with your condition, then that is the proper channel.

 

You can give Dawah to all people, but you need to keep the proper conduct when dealing with the other gender.

 

Dating to impress women in a Haram way is not allowed. You can use social venues like through family and websites to look for the best match and be yourself and honest about all your matters.

 

Almighty Allah knows best.