Here is another primer
https://www.theshrimpfarm.com/posts/shrimp-caresheet-red-cherry-shrimp/
I would go for inert sand for the substrate and easy plants. If you do decide on an HOB filter you need to make sure the intake won't suck in shrimplets - you can us a piece of stocking or similar to prevent this.
You don't have to worry about neos breeding out of control - the population will grow to what the tank can sustain.
Personally I do feed mine, just good quality fish food - but they don't need much.
Oh and make sure you only get one colour / type - otherwise in a few months you will end up with a tank full of brown shrimp.