I started wearing full-time about six years ago due to my urge incontinence getting pretty bad. Prior to this I had gone through many 24/7 periods over the years, so I already had a lot of experience. You have to wear for the worse situation, which in my case is a really messy diaper. Find a diaper you can trust for that situation and one that's comfortable. Also, most people who first start wearing diapers in public think others will know. Believe me I've been wearing diapers around other people for decades and it's just not true (I do wear baggy clothing though). Take several changes of diapers, powder, rash cream, wipes with you in a backpack everywhere you go for any length of time. It's not much of hassle and becomes second nature. I have a smaller hip pack too for more discreet changes. There are lot's of other tricks like wearing a onezie to hide and hold up your diaper, wearing darker clothes in case of leaks and so forth. Your goal should be to get to the point where you just check your situation and change every so often and don't worry about it in between. Good luck.
Spaz