It's entirely up to you, really.
Western hognoses are adorable, docile, mellow and don't grow too big. You'd need to get one from a reputable breeder that is well started and accepts frozen/thawed unscented mice. I've also heard they can go off feed in the winter. The catch is, their mild venom. A nip shouldn't be harmful to a normal healthy person but if an allergic reaction like anyphylactic shock (I know I misspelled that) happens, that, would be a problem. Correct me if I'm wrong, anyone, but there are some medicines like "epipen"? and basic antihistamines that can be kept in case of this. And in the very rare case that one does bite, don't let the critter chew. (don't get me wrong, they're awesome little critters and I hope to get one myself someday.)
Keeping a spritz bottle of white vinegar prepared and ready is a good idea no matter what species of snake. In case a snake mistakes you for food and chomps, a few spritzes of vinegar persuades a snake to spit you out. (I've gone around smelling like an Italian resturaunt before)
Cornsnakes are pretty much the classic beginners snake. They come in many color morphs, are hardy, docile, etc. They grow up to five feet or so and are faster moving than the hognose. They can escape, same as any snake, but having a good cage and keeping it latched should prevent that. The cornsnakes I've handled seem to enjoy exploring. So they move from hand to hand a lot. But all in all, quite nice critters.
Good luck deciding and with your new snake.
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0.1 chickens (Condor)
0.2 dog mutts (half ownership, only mine when they misbehave, Lucy & Amy)
0.1 Halflinger horse (Crissy)
0.1 Normal phase California Kingsnake (Sophia)
1.1 parents
Still searching for 1.0 WC human