I have thin hair, i don't know what my hair type is, but i started my dreads in 2016 (my little sister twisted my hair) I've had like 5-6inches of hair to begin with, that was when i had a mini-afro, but as they grew out, I thought they were all gonna be thin, but my own hair had surprised me, some thick and some thin, but half of them were combined as they've gained length as I maintained them, i love my locs, but me personally, i wish they all were a little thicker, but i was born with thin hair, so i learned to accept my hair texture, both sizes are good, but they have their pros and cons, keep that in mind when getting locs.
Washing your locs and leaving them wet will only cause them to grow mold, let alone leave them prone to attracting unwanted insects, clean hair is healthy hair which locks up faster than hair that's dirty.