Welcome to iMore! It's great to have you here.
@Mars20 is right... don't forget your AppleID and password. I recommend setting up security questions and keeping the answers in a safe place. Two-factor authentication is also a great idea. As for tips and tricks, recommended apps, etc, there are tons of posts here that you will definitely find helpful. And, when in doubt, please post a question. We're always happy to help.
Another thing that would be great for you is the "Today at Apple" program. If you have an Apple Store nearby, check out the "Today At Apple" program. They are a series of workshops and training sessions about a myriad of topics, which include an introduction to the iPhone. They are free to anyone with an Apple ID, and you can find a schedule of classes at your store on Apple's website.