As a 30f where can I meet new friends and how can I adjust to a new life?

I'm 30, married and I live in Tunis. Idk anyone there, and I'm always homesick, I couldn't get used to the fast pace of life in Tunis, I used to go to the beach daily and be surrounded by nature all around and now whenever I go out I see l metro and crowded coffees, I don't have a car and can't stray far from home, so I feel so isolated in Tunis and sad. I thrive in nature so being in a big city is making me miserable, I'm also shy and introverted and have a hard time making friends, and after all, how can I make them? I found myself ever since I got married forced to spend many weeks at my hometown to cheer myself up but when I'm there I miss my husband so much and feel low too, it's like I belong nowhere.

Sorry I guess this is a rent but I also know I need to be proactive to make a new circle for myself and I have no idea where to start and how to approach people and how to fit in.