Good rasbora for a first time aquarium?

I’m looking at setting up my first fish tank—either a 20 or 30 gallon planted community tank. Im not completely new to fish keeping, I’ve helped friends set them up before, but it’d be the first one that’s entirely my own. I love nano fish, so I was thinking a big group of a really colourful rasbora would be amazing.

My two favourites at the moment are chilli rasbora and green kubotai. (Very open to other ideas!) Are either of these suitable for a first tank? The water in my area is supposed to be quite hard, which I think they tend not to like as much, but most of the care guides I can find say that they both are adaptable to water hardness.

I’m also interested in raising fry at some point down the line. I’ve heard chilli rasbora are quite hard to breed indoors? Are the green kubotais or a different rasbora altogether any easier?

My boyfriend would also like a bigger centrepiece fish that would contrast nicely with the rasbora. He loves the blue rams, which would look amazing with the chillis, but I know they’re not suitable for beginners. Are there any combinations of feature fish/rasbora that work really well and look great?