Okay, so you probably have a broad area, and that's great.
I can think of so many areas of helping others. This may not be the type of GAL that you had in mind, but it might make you feel better helping others, and if it gets your mind off your own problems for a while, then that's worth it.
You could start by deciding what age group you prefer.
If you love working with kids, then there is everything from coaching sports (individual one on one help throwing a ball, or working with a team), to tutoring a child in reading. (So many kids can't read. Their teachers do not have enough class time for each student to read out loud.) The list is endless!
Maybe you feel good when you give your time to elderly people. There are so many who need small repairs made around their homes; running errand; taking them to dr. appt., etc. Some caregivers would like to have a couple of hours away if they had somebody to come sit with their elderly (perhaps sick) parent.
One area that is needed are people who are qualified to babysit a child that is mentally/physically challenged. Parents would love to have a couple of hours just to go out and eat dinner together or be with friends, but it's hard for them to find anyone to sit with their child who has special needs.
If you like animals, offer to pet sit or walk the dog walk.
There are thousands of things to do in the area of "giving yourself". However, you may just need to be around friends and enjoy having good times. Be in places where music is playing and people are laughing and happy. That's the kind of medicine our souls need. You may seek out quiet places where you are close to nature.
Some folks need activity and others seek solitude, but whatever makes you feel energized and have a greater capacity for life....that is what you need to do. Take care of you!
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!