Been there! And still feel overwhelmed sometimes after looking at other's beautiful layouts.
I'd say, start with something small... 6x6 album. Use 1 photo, add a couple of embellishments, journal... then go onto the next page. Before you know it you will have completed the book and will have a feel for what your style is and what you like.
Most importantly, try NOT to compare your work with others - you are your own person and you have your own style. (Of course, this is easier said than done! LOL) Just relax and have fun. It will all come together for you. Good Luck and Welcome!!