Advice for Fiance's First Time

Hey so I'm an experienced tripper (~10 times or so) but my fiance wants to try some acid for the first time with me today.

I've got like 3/4 of a paper tab for her but idk if it might be too much. I think the tabs are personally really weak (they've also been wrapped in foil for a year) but they might be stronger to a first timer. She struggles with mental health and had a bad morning but seems to be in a much better mood now. She's also on Wellbutrin (150mg) and buspar (5mg) which she took about six hours ago as of writing this.

I just really want her to have a good time and maybe help her out mentally, so I'd appreciate any advice anyone can offer. I think I'll give her a half tab instead of the full 3/4 but I want her to have like a solid mild trip.