Dosage Advice - Zero Tolerance

Hey I quit weed years ago because it started giving me the worst anxiety. But I got my hands on some 25mg HHC gummies and heard they're not as likely to induce paranonia.

Once every 3-8 months I might take a single puff of a joint (European style) and be kinda faded and Edibles (THC) I've done maybe 4 times in my life and even when I was smoking daily they would basically put me down. So it's safe to say that my tolerance is non-existent (if there even is any thc-hhc cross-tolerance?)

What can I expect from taking half a gummy (12.5mg)? I'll be in bed, so I don't mind getting a bit too faded. But I would like to avoid that horrible existential dread that THC usually hits me with.

Any advice is welcome