Looking for LUKS GUI

Hi

I am looking for good encryption local-only folder tool.

I took a look on LUKS but… I tried to find Linux GUI install guide, but I can’t find it.

I run Linux Mint 22 Xia (Cinnamon)

Secondly, how really secure LUKS? I need to store some really important information (journalism) and in my situation it MUST be encrypted and treated as highly classified information. It is really important.

I am journalist, so this is highly important n

I really don’t have time to try everything myself, as if I will mess something up, I will be in whole ocean of trouble.