Curiousred, get yourself a fountain syringe and "test it out" by giving your self an enema or ten. 😁 😁 😁 😁
Go easy on yourself, expanding your sexual experience is not a race, and done in the privacy of your own bedroom, it will be relaxed. The problem so many people have in expanding their sexual repertoire is that they are pushed into something they don't understand, never tried before and/or don't know what the sensations should feel like or are just too apprehensive for the above reasons to have a good time.
Next get a real human sized dildo, not one of those supersized pornstar dongs.
Then lube up your butt inside and out, grease the dildo and slide it around.
GO SLOWLY AND GIVE YOUR ANUS TIME TO RELAX AND DILATE.
The place for you to learn the sensations is alone in the privacy of your own bedroom. You can take it at your own pace without having to ask anything or explain anything to anybody.
It will take a little practice, but if you have been thinking about it, you will most likely enjoy doing it.