You'll hear a lot of think it through and make sure you want it- and it's not a "oh you're gonna regret it", it's a "make sure this is something you truly want because it is a big, life altering decision and once you've passed the point of no return, there's no backsies". I've given that advice plenty of times, because it is better to make an informed, thought out decision than rush into something and find out it's too late to change your mind. There's been plenty of posts on both sides- people who diaper-trained themselves and are perfectly happy, and people who have diaper trained themselves and wanted to undo it, but couldn't.
There are already plenty of threads with advice on diaper-training/ becoming incontinent. Go read through 'em. TL:DR version of it: you wanna live the diapered life? Just do it. Right now, go for it if you want it. Get yourself some diapers and go 24/7. Bladder, bowel, whatever you want. Act like you're incontinent. Just wear at night if you want. All night every night. Or during the day if you want that- everywhere you go, go diapered. Spending time with the family? Well, an incontinent person would be diapered. Hot date night with a significant other? Diaper is coming along, even if you're just night time incontinent. If you're gonna fall asleep besides them, it's best to diaper up since they probably won't enjoy waking up to a wet bed (then again, they might if they like water sports. Always good to talk that stuff out).
Life is short, so go for it and enjoy.?