Congrats on your first trailer purchase and welcome to the world of camping and this forum. Don't know that I have ever heard of a beginners book on RVing, but browse around here and you will find all kind of information, including checklists and towing tips. If you have any question, no matter what it might be, do not hesitate to ask. There are a lot of friendly and helpful people on this site.
Jack of all trades - Master of none
2012 F350 CC DRW - 6.7L PSD
2014 Sabre 36QBOK