Friendship anxiety. Adults please.

For context, I'm in my 20's and had to lose a few friends because they were toxic. But now I'm trying to make new friends and be more social it feels like I don't know how to make friends as an adult? One friend and I were in a relationship where we engaged in behaviours that were completely toxic and I feel like this anxiety is an offshoot of that. Like I don't know what's acceptable and what isn't anymore. Any advice on how to get over this feeling? And any tips on being social would be great.