1964 JFK 90% silver half dollar

Hello I have a 1964 jfk half dollar 

And need help finding out it’s worth

And how to go about possibly aselling 

My coin

Here is the Numista page for the coin:

N#943

The current silver value of the coin is around $8.5.

The Numista page has values for various grades, and the currently listed values are below the value of the silver unless the coin is almost perfect (which your coin isn't).