New user: did I set myself up for a keylogger or worse?

Hi,

I used Zoom on a one-on-one meeting with a business instructor last night.

The man wanted me to share my screen. I clicked on the pop-up to allow it.

Then, he started moving my mouse and clicking things on my desktop.

I thought that he would only see my screen and that I would click on the needed links, etc.

Did I set myself up for him installing a keylogger or worse?

Is there any way he can regain access to my desktop? If yes, how do secure it?

Also, I didn't see a better board to post this on. If I posted on the wrong board, please let me know and I'll move it.

Thank you!