I'm setting up a fish room in my basement. Tips?

I'm a new time breeder.

At the moment, I have four tanks consisting of Bloody Mary shrimp, blue dragon guppies, and soon-to-be medakas. I'm cleaning out a small room in my basement that hasn't been used in many years to be a fish room.

I plan on adding one double rack for approximately 50 gallons this year, as well as a small tank stock pond, probably about 50 gallons, to mostly grow plants in. What are some fish/plants I should stock the rack and pond with? Here's some things I was thinking about:

Racks:

- Another strain o​f guppy, preferably moscow or red dragon guppy.

- A species of cichlid, like krebensis or convicts, or maybe rams.

- More neocaridina shrimp

Pond:

- Another species of medaka, preferably yokihi or orochi.

- Java fern

- Amazon swords

- Hornwort

Is there any other species of fish or plant I should look into? These are just a list I came up with in five minutes, so I might've overlooked something.