Lonely,
It's a tough time of life you're at for the pursuit of diaper wearing. If you cannot sneak these and you are not comfortable just coming out (who is?), you need to wait.
Best bet is to wait until you are 18 and out of the house. 18 at least even if you still live at home. Once you are an adult you can pursue diapers in whatever capacity you choose. Go wild!
Not sure of your age, but maybe high school time your parents will give you more liberty to move around unaccompanied. Some parents get worried when they find out about their teenager wearing diapers, so there are hazards. Coming out the right way to open minded parents versus coming out to strict, paranoid parents are two vastly different experiences and could damage your relationship with your parents. Each situation is unique and you know what is best for yours.
Childhood - stuck somewhere between being a person and property. We all have to go through that. Just try to keep a healthy perspective in knowing that you will eventually be an adult and able to make your own decisions. Someday you'll look back and think about how nice it was to be a kid. Strange, but true. Enjoy these times as they are 'the good old days'
All the best,
PumaPunku
Disclaimer: I am not a doctor, lawyer or counsellor. None of this post should be construed as advice, but mere entertainment for the benefit of posting on this forum. Any advice implied or inferred is coincidental. Any and all subjects, ages or facts are null and void. This writing may be considered editorial, fiction or otherwise and not intended as communication with a minor. (sorry we live in a world where I have to write this disclaimer)