A small filtered tank wouldn’t take up much more space than a bowl and would be way
better for something like a few small shrimp. They’re very active and won’t mind being a bit cramped.
Shrimp wouldn’t mind the small space but are sensitive to water parameters so a bowl with no filter or top would cause issues both with cycling and with evaporation causing swings of tds
which could mess with them.
The thing is nothing
is going to be easy to care for in a bowl. (Except maybe plants/ moss ball)Water parameters will always be on edge and you’re kind of setting yourself up for failure.
You want easy? Set up a 5-10 gallon with a single betta and a couple nerite snails. Snails will control algea and the bioload will be so small water changes will be minimal compared to needing them every day or two in a bowl.