Need Advice:

My whole life, I have been a sole developer. Most of my project was a single person. I was responsible for the frontend, background, server deployment, and everything else. I liked doing the thing my way.

After working like this for a decade, recently, my company hired a second developer to help me (So I can do the management of other projects.)

The biggest challenged that I am facing right now is the difference between my thinking of a problem or the way to solve problems compared to the other guy.
There are many things that he and I do differently.

I need some advice on how to work in teams. I how to manage things better.