Installing on Linux Mint

Hi I’m new to Linux and still have trouble installing software that’s not from the built-in Mint repo. I downloaded the file [] that’s found on this page Releases · logseq/logseq · GitHub
Problem is that I’m not sure how to commence with the installation. Any help would be greatly appreciated because Logseq looks to be an amazing piece of software!

P.S. Is it possible to completely install Logseq inside an encrypted file, such that all the data is private once I’m done using it?

Thanks in advance,

Would installing it from here be a smart way to do it?