Well we all start somewhere, you will have 6 weeks to plan it out, you need to block the prevailing winds, which are usually northwest, Sun to the south would be nice, nothing fancy needed, you could use gravel or sand for the bottom for now, and as I said your roof will need a slant or pitch so the snow doesn't collapse it, people build coops with pallets, it's a bit of work taking them apart but they are free most of the time. Just some ideas.