I’d say you should worry about it all you want beforehand, but make sure to go, and make sure to leave those thoughts at the entrance. These thoughts/emotions are there for a reason, but IMHO they are more useful for preparation, not for the event itself.

I sometimes even mime putting such intrusive thoughts into an imaginary box, locking it with a key, and setting it down somewhere, or tossing it over my shoulder. This sort of ritual helps me to really cement my intention of leaving something that I no longer need behind.

Also, having you wife with should be a great help, for obvious reasons. But really you are an adult, as long as you don’t show up in a sailor moon costume I doubt if anyone will be paying much attention to you at all.

This is indeed some next-level fuckery.

No, there are abilities that grant auch bonuses for longer, like this one:

https://2e.aonprd.com/Feats.aspx?ID=1978

It’s usually better to not look for general rules, but to instead get used to reading the ability descriptions with a focus on the key words, like traits, bonus/malus types, and saving roll types.

Edit: I made a mistake, that example does indeed just grant the bonus to the next attack only. Perhaps that rule is correct.

Pathfinder 2e is extremely clear in it’s rules, you just have to carefully read the descriptions.

From Monster hunter:

You and allies you tell gain a +1 circumstance bonus to your next attack roll against that prey.

From Double Slice:

Make two Strikes, one with each of your two melee weapons, each using your current multiple attack penalty.

So you make two strikes, you roll to attack twice. The bonus only applies to the first strike. If the monster hunter feat had the following text, it would apply to both attacks:

You and allies you tell gain a +1 circumstance bonus to your next action against that prey.