Let me help here. I will update this post to include a concluding remark solving the problem you highlighted.

You can choose more than one fields of interest and you can rotate among them. I know a lot about a lot of things too but I always hesitate to make a mess on my blog. I will, however, write more on life and finance due to my great interest and study.

For now, what you can do is to choose two or three topics and then stick to them. A personal update from your life is always welcome by the community so you can additionally share stories and happenings from your life as well. But choose two to three topics and then dedicate time effort, and energy to be good at them gradually.

I think being known for something is important in all kinds of blogging. But you have to be good at something to be known for it. And having a focus on a topic gradually makes you good at it.

I hope I eased some of your burden.