Definitely big ups on nitrous.
I have had people who have never tried a single drug and are opposed to all drugs, but for some reason they decided to try it.
Soo that day me and the two anti drug friends of mine went through a case of 100, and loved it everytime.
It's definitely very psychedelic, but markedly different in the way that it produces it's own euphoria which is very powerfuland makes it nearly impossible to have a bad trip on.
I've been watching people do nitrous, mainly me and my friends and tons of people at festivals) and no one has ever said it was bad or even mediocre.
Definitely do it sober, but safe most of it for times when you're stoned or doing psychedelics.
After you've tried it this way you'll wonder why you ever did it sober.
Try sober the first time to get used to the effects, I recommend two balloons for the first time since the duration is so short anyway and it makes it that much more worth it and the effects last much longer
Honestly the best experiences I've had from any combo have been with psychedelics and nitrous, but it is such a shame the effects are so short lived, even if it lasted twice as long it would be that much better
EDIT: if you can't find a whipped cream dispenser and only a cracker, then be careful using it.
The gas release will make the cracker extremely cold and can give you frost bite, wear gloves and don't fill a cracker into a balloon, they tend to pop when the balloon is hit with cold air or freezes onto the cracker. I just use a small garbage bag and like three or four straws in a bundle