Hi, I am super new to fish. Wanted to start a freshwater tank and read a few articles on fish for beginners and I have a few I'm interested in but wanted some advice on how many per each fish since some need to be in groups. So the ones I am thinking about are -neon tetras -danios -platies -guppies -pleco (tiger or bristlenose) -betta (this one scares me) Obviously it's probably not practical to get them all but any guidance on which of these work best together, have similar livng conditions and how many of each breed would be greatly appreciated. I am open to a tank between 20-50 gallons. Thanks.