I can't really comment on whether your income is sufficient - it depends on how you want or need to spend it!
However, as for filling your time, there will probably be plenty of opportunities. We have become involved in all sorts of things that interest us, many of them community based and, as people often say, we don't know how we had time to go to work. There are village coffee mornings, church events, the local archaeology group as well as our individual interests to keep us occupied.
I suggest that you start by looking around for groups and organisations that are linked to your interests and join one or two. If you don't enjoy them, leave and try something else! I think it's important that you get out and meet people somehow - are there local coffee mornings, for example? Just being outside is good, so gardening is a good way of doing that and , if you don't have a garden yourself, there might be a local group that runs a community garden or something of the sort. If you don't have a dog, do you know anyone who does and needs it walked? Dog walkers talk to each other! Volunteering in charity shops, schools etc is another way to fill some of your time.
I'm sure there will be plenty to do. Don't be afraid to try something and then decide it's not for you. You'll find ht eright things in time. Good luck.