I felt similarly, and had read good things here about XP Medical, so got some sample packs (3 each) of what looked interesting. Just remember to take your measurements thrice and review the cart.
I totally mistaped the first two and derped the timing of the next. For what I wanted, though, that worked well. "Just how scented is scented?" "How hot is plastic?" "How much does cloth stretch?" But, at the same time, it doesn't really let you figure out what you like at such a small package... it was hard for me to tell at a sample, but a pack* sorted out a couple different kinds I was wondering about, and I buy those now. It's also cheaper to buy more. Don't buy sample packs of anything unless you are sampling!
(By the way, there's a warning if you use PayPal involving shipping addresses. He means it. I swear, every time I need to adjust the address, and one time I didn't notice and had to email the correction... unless you want to mail a surprise package to your mom, of course.)
The first thing I did when I unfolded one was took one look at it, looked at my waist, then looked back, then looked at my waist again, and made some explanation along the lines of "that really fits?!", measured myself again, then read how to put it on.
^ In case you aren't in warehousing: 'packs' are what come in box 'full cases' and 'half cases' that stores put out to sell... and a full case of diapers can be a lot of diapers! The "double packs" of Depends are about 20 diapers per pack, two in the case, and Senis pack 8 packs of 10 into their cases. Coincidentally, don't buy by cases unless you want what you're getting.