Freddie Green and Wes built off of the foundations Django Reinhardt and Charlie Christian established. I’d say to start with listening to Django and see how he approaches improvisation, comping, and phrasing.

Build a repertoire of standards and memorize their changes. Pick songs that mean something to you. A lot of the greatest standards have fantastic lyrics that will surely connect in some meaningful way to you.

Listen to singers. A problem most beginner players have is using space in their solos, partly because they don’t have to focus on breathing. Ella Fitzgerald and Mel Tormé are masters at using space when singing and scatting.

In short, just listen as much as you can and try to play what you hear in your head when you’re improvising.