Safe to upgrade from High Sierra HFS+ to Mojave/Catalina APFS?

I'm on high sierra and my boot drive is HFS+. Updating via the app store to mojave or catalina will convert my boot drive to apfs right? Just wanting to make sure that the conversion won't break anything such as booting macos with clover or corrupting stuff (i do have all my files backed up but just wanted to check!)

submitted by /u/Hey_Papito
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