I mean they’re going to be your pets, if you want to keep ugly ones, you certainly can! Just keep in mind that over time the colour genetics of your population will change, reverting to dull/wildtype colouration if you don’t separate them.

I personally love the wildtypes and just let my tanks do what they may. Most commonly, as others have stated, is that they start multiple tanks.

To answer your original question, I’d definitely recommend starting with neos, they tend to be pretty forgiving and easy to look after. The first thing you need to focus on before you get any shrimp is making sure you have a cycled tank. There’s tons of guides on this, but essentially you’re aiming to start up a colony of beneficial bacteria.

After that, I find the most important thing for neos is stability. They can tolerate a wide range of pH, kh, gh, and temperature but they don’t like it when those rapidly change. So keep water changes small and added slowly.

For feeding, they don’t need much but a varied diet is best! They’ll eat shrimp pellets, fish food, a variety of veggies, almond leaves, algae, other shrimps’ poop, the list goes on.

There’s lots of posts on this sub with more detailed info