Downloaded a suspicious app. Please help

I use a mac and I downloaded typerdex(.)org’s app. Came across the app thru someone on threads and they guided me to download and install the app but it wasn’t the usual way of installing.

After opening the dmg file it said to move it to terminal and when I did that and press enter it asked me to enter my mac’s password, I did that and that was it. I don’t see any app installed. I’m scared that there might be something running in the background that I’m not aware of. The person who guided me has blocked me so clearly there’s something going on. Is there any way I could find out if this is a virus or something and if so, how can I get rid of it?

Appreciate the help!