I will only keep them until they are around 7-8 weeks old. This information has helped a lot. I still would prefer I had more input.
Do research. This site is valuable and free. Utube is educational - bad and good. Learn what to expect. The only person who knows what you don't know is you.
Having become an internet expert, you will still learn by actually seeing, doing, smelling and hearing. There will be issue with your setup that only you can fix. If you are trying to maximize production in your space, you will have different problems and solutions to others. I still say start small and scale up. It takes longer the first time at anything. The payoff it high, but so is failure. How much do you want to risk?
I started with 10. 20 planned for the fall. I am learning. Teach me.
Random thoughts:
Is your coop completely covered or does rain get in it?
If using deep bedding, will you buy hay, wood chips, wood shavings, sawdust or others?
How much time do you have for chores?
How to handle sick chickens?
How about predators? Family dog? Cats? Hawks? Owls? Possums?
Best wishes!