How about joining a special interest group in the hobby you want to have?

Toastmasters is good if you want to improve your public speaking.

Or, a photography, art, book club. Or even a mental health support club.

Or, a charity group or young professionals group.

You could also engage in your hobby alone. You could get books, watch online how to videos, and start your own hobby or collection. Say, learning to draw nature or collecting stamps. Some hobbies can be done alone at home.