Seriously, what is your aquarium experience. Have you had multiple tanks for a few years.
If not, you really REALLY need to learn to run tanks and deal with water chemistry and tank maintenance and typical problems and stuff first. (You could learn that with guppies, if you want, and still be producing some babies, but otherwise I'd say just try some nice easy community fish).
That's not entirely true. Most people don't bother with water chemistry. We have 13+ tanks here, with fish from bettas and angelfish to tropheus duboisi and piranhas, and we've never mucked with the water chemistry. Unless if you're working with a super delicate species such as discus, your best bet is to acclimate the fish to YOUR water instead of messing around with it. Believe it or not, but most fish WILL breed and reproduce in "unsatisfactory" water conditions (like in completely incorrect pH) as long as they've had time to adjust to it.
Solace, gorgeous Endlers! That's another thing about Endlers, you can get several different varieties! They're not super expensive to purchase, but, they'll turn an ok profit if you know what you're doing. They're pretty hardy little fish (but I admit that I lost mine in a temperature spike in the apartment, tank was over 90F!) and they're pretty forgiving of abuse and neglect from beginners.
Some of them are pretty bad pictures, so I apologize, but it gives you an idea of some of the black bar Endlers that I had here. Mine were registered Class "N", proven strain back to wild collected specimen. Shame I lost them, but I just don't have the time anymore to get more.