Can I try peanut butter for the very first time?
Are you going to make a sandwich?
No, I want to eat it out of the jar with a spoon.
I think it is exciting you want to try new things. If you are allergic to it, you should avoid those things that make you allergic. It could cause more harm than you think.
Will it hurt?
It shouldn't hurt if you are not allergic to it. It is expected that you always avoid whatever makes you allergic. You can try a little bit at a time to make sure there is no allergy.