I would relativised the role other people may play in your life. I mean...the most important is your own self-confidence and enjoying the activities you choose. The other comes within. And much more if you don’t have problems being sociable.
I’m not saying is easy to find people you may feel comfortable with, ok? It will depend on many factors.

For example, my mother is such an easy-going person that she joined a group trip (it was the first trip she enrolled in after my daddy’s passing away, the very first trip) and from then on, she has a group of friends to do all kind of activities and even a partner.
I’m just the opposite. So, it will depend on many factors. But, first, it’s you and your interests. It’s convenient not to begin to build the house by making the roof first.

It will depend on what you like to do and be engaged with the most. For example, if you like hiking is a good option because there use to be be lots of groups everywhere.
If you like animals you can offer a hand there and meet like-minded people.
The same with other activities as drama groups, dancing learning, or any kind of learning -a new language-, etc. It will all depend on your likes, your level of energy, the time you have available taking to account the hours you have to dedicate to your job.

P.S.: I know it’s not easy when you feel a low mood. At least, I hope you don’t have social anxiety. I don’t know it. In this case, it would be even more difficult.