I feel like I have no idea what I'm meant to be doing. I feel like I'm always waiting for something. How can I start to live?

I'm 29F (and I have ADHD, not sure if that's relevant) and I feel like up until this point, I've just been waiting for something. I haven't really been enjoying life as it happens. There are small good moments but there's no overall feeling of satisfaction and contentment.

I went to college, I got a job, I got a dog, and bought a house. But I feel very empty a lot of the time. I do things I enjoy and I feel happy for a little bit then I go back to feeling empty. I feel like I'm just trying to distract myself all the time. I spend time with people and it's enjoyable for about an hour and then I feel very mentally drained.

Anyone else feel like this? Or felt like this? How do you find satisfaction in your life? What do you fill your time with? I'm single and I had hoped to have a family by now. I believe that will happen but until then, how can I enjoy life and all it offers?