Planning to trip with this girl...

So I’ve tripped once before on 100 ug and it was good and bad. I had a bad trip but also had a good one at the same time it’s a long story but anyways it’s her first time with any drug and she wants to trip. Would 25 ug be good just for open headspace and nostalgia? I don’t wanna go any higher than that because the plan is to trip at a park and just sit by a big tree for the entire trip till night time since I’ve heard acid trips in nature is nice. Anyways any tips or should I go higher and how hard does 25 ug hit?