Does it have Discovery as a normal app store? You might be able to use that.

Honestly, give the terminal a shot - it's not as complicated as you may think.

Sure, basically any Debian-based distro should have gdebi in its repos.

I don't know what this people talking about,u need just double click on deb file it will open grahical installer,if not check file assisation it shoulb be assigned to Eddy program.It's pop os alternative to gdebi.

Yes, gdebi :

• https://screenshots.debian.net/package/gdebi