So glad you decided to join our community! You might start with some reading in our Learning Center for all kinds of good articles on all the aspects of keeping chickens... https://www.backyardchickens.com/articles/
And feel free to ask as many questions as you need. Welcome aboard!
We have plenty of advice! We advise you to get as many chickens as you can keep comfortable in the coop, then build another coop. Repeat.
Do you currently have birds?