Hi Amalia, welcome!

Use what software you have. It sounds like you have Photoshop, Illustrator and InDesign. For layout, you'll want to avoid Photoshop, but it could help you with your graphics. You also could use Xtreme if you have it.

Find out where your broker is going to have the printing done and contact them about what specifications they need from you. They'll usually help a new designer like yourself. Knowing what the printer needs will help you decide how to start.

Then on price, be fair, but don't sell yourself short. I can tell you up here, northwest of you in Denver, that new designers freelancing like yourself can get $35 an hour pretty easy. Most of the decent ones charge at least $50 and hour and the really good ones can get $75 and up.

An important part of your rate is to be confident (even if you're shaking inside )with your broker. Think of them as your first client. Your attitude will dictate what rate you can charge. If they see you as confident and professional they'll respect you and your abilities.

Hope this helps.