I think it is typical early on in transition or soon after you've realized that you're trans to struggle to think or talk about anything else. It's difficult because once you realize and have a word that explains things, you want to shout it from the rooftops and learn everything you can about it.
What I found worked for me was to do research - learn about what was available to transmen who were transitioning in terms of hormones, surgeries, etc., and make a general plan for my transition. It alleviated a lot of stress and worry, as I knew what I needed to focus on at each phase.
I also found it helpful to get connected with other trans people who were further along in their transitions and were happy to answer questions. Forums like this, support groups, other online groups, or just other people you know - all good resources. I've found that talking to people who are further along keeps me grounded in the present and provides a sense of hope when things look bleak.