Welcome! We are new to chickens too but are a few months ahead of you. You are going to like them more than you thought!
My husband made our coop from materials we mostly had laying around. When we account for all the food we had to feed our chicks before they started producing eggs, we were glad our investment in the coop itself was small. Ours works well and my husband designed it himself. I'd post a pic but have a hard time doing that here on BYC as I'm not that savvy with message boards. But we spent more on food/waterers and feeders/snacks and other supplies than we did on the coop.
We ended up with three breeds but have a definite preference for our Buff Orpingtons. Very good for beginners, very docile and friendly, easy to catch. Lovely eggs. We also like our Rhode Island Reds but we would just get Buff Orpingtons if we had it to do over. We purchased from a local feed store and that worked out really well. We bought extra thinking we would lose some, but since we bought them local and they were nice and healthy, we raised them all. And the breeds were correct for our area which is pretty cold as we are in SW Washington.
BYC has been an excellent source of all kinds of information for us and helped us every step of the way.
Plan for more than you think you will want. You may catch chicken fever!