You must be very lucky if you have excessive amount of free time. In today's society that's very hard to have. There are things you need to do, which you might not be doing, and that is having good family time, and interacting with your family members, your relatives, your friends. Socialising is a healthy thing.
If you are of marriage age, and you are single, then in shaa Allah marriage will help you a lot.
Reading is important, and having a good reading routine. It can be religious books, or non-religious books, as long as somehow you are benefitting and learning.
Maybe you can join a course, like a Hawzah program, or some other field that interests you, like graphic design or something like that.
Sports and recreation is good. It does not need to be competitive. You can go bush walking, or hiking, or something like that.
Having a hobby that can keep you motivated and gain a skill is also very good. By having these things, you will expand in your horizon and have greater ambitions in life. Hopefully these things will enable you to be more useful for yourself and for others.
With prayers for your success.