It might help if you told us what exactly was making you so apprehensive? A relative or significant other finding out? Fear of being seen in public with a diaper exposed?
Honestly the best advice I can try and offer you is don't worry about what strangers think, they won't remember for more than a day at the most.
If you are talking about wetting and relaxing, don't try and force it. Try out wearing, see if you find it enjoyable. Get comfortable with them. When you think you can handle it, just make sure you have drank a good bit of water before hand. Soda or caffeine drinks work well too, since they make you urinate.
I hope you find someone on the site to try out your new hobby with.
Best Wishes.