Hey Eressea! I do love carries! They are very very functional and super straight forward. You don't need to do much wt at all for it to make a big change in your body- big change. And there are tons of ways to do them. Here's a few articles to wet your whistle! But for the very most basic, you can just put any dumbbell in your hands and walk! Trap Bar, barbell on your back, barbell over your head, pretty much anything can be used.
Things that changed for the better on my body personally - for sure obliques, butt, traps, lats, forearms. Some carries will add to your abs as in build them on the sides--for me this is not a bad thing, but some ladies have other goals.
Check em out! They are so simple and very effective. I don't know why more people don't do them, they seriously make a big change.
fs 45x5, 135, 185, 195, 205, 215
180x11, 190x5, 200x4, 210 x2
180x9, 180x4, 200x2, 210
back extensions with holds on top