That's a really tough situation, but with some active work it's manageable.

Most important to remember that the feeling of loss you have for your family connection, is real, is okay. But like all things you will learn to live with it and see benefits in it if you work at it.

Nothing can replace meeting people, new (seeing people and talking to people) and familiar (family & friends).

So how does someone in your situation achieve this?

Well you've mentioned hobbies and this is your best option:

- is there a board game cafe near you? They often run social events especially DnD open nights.

- adult education classes. In person is good but online is fine..why don't you see who runs online courses? Location matters less. French, Spanish, Japanese?

- activities, these are great but need to have a connection to them. Swim clubs are great as are bouldering/climbing clubs.