In some ways i still consider myself a newb even though i have eight tanks and six of them are planted. I also have four kinds of shrimp. I have been breeding cherries for a long while. Why do i mention this... well because you seem eager and ready bit my advice is take it slow and learn what you can before you start. You mention you want to sell shrimp to help fund future purchases. The problem is shrimp are trendy and ever growing mixes and flavors makes it difficult to pick a winner for resale. So i think pick one you like that is considered easy on the breeding scale. Learn from there and enjoy it. If you sell some stuff thats a bonus.