Have you heard of HALT?
Hungry - Eat
Angry - Call someone or go to a boxing class
Lonely - Go to a meeting or call someone
Tired - Sleep
These are just simple reminders. Sometimes our basic needs are not met so we just need to look at the simple ones.
Treating emptiness, depression and anxiety don't have one common solution. However there are ways I have found helping. I am glad to hear you are going to meetings. Make sure to get phone numbers. It may seem difficult at first but find the courage and ask. When someone asks me for a phone number I am always flattered. When they call even more. Many love to help because it helps their sobriety.
Also try and find a hobby, anything you can do with your hands. Nitting, drawing or whatever. I used Photopearls, Google that! LOTs of fun!
Listen to online speakers. I am a part of AA and personally Love a speaker called Bob D. His view on things is so interesting.
There are some occasions where nothing helps me. Now I know that. I still call My sponsor and say "Hi, today I hate the world and they all hate me" because those feelings then and there are real. Sometimes I feel better after being Honesty but there are moments where I just need to trust "this too shall pass". Try notising when you feel better again, write it down and remember it. It will strengthen your trust next time it happens.
Most effective for me though is to try and get out of my own head and ask how someone else is doing. You can help others in small ways. A phone call is one example.
I could write even longer about this. You just need to find your own way. Continue with your meetings, get Numbers, use them! Take action even if you don't feel like it.
Hope any of this helped!
You also have this forum for support and people cheering you on.
It will get better, trust that!
Hugs from Sweden