Welcome both of you. Jan's right, challenges are a great way to dive right in and get started. Template and sketch challenges, and scraplift challenges, like the Member Spotlight Challenge, are great for helping you get started.
We DO have a lot of talented members here at SAS, but you'd be surprised at how many haven't been doing this that long. We recently had a post were members showed their first layouts and their current favorite, and even though they, personally, found flaws in their earlier work, no one else could find anything to fault in it. The lesson there is we are our own worst critics.
Dive in, have fun, and don't be afraid to ask for some help or a critique of your work. I've learned so many incredible things from the digi-scrapping community that have helped me grown in the mere 9 months I've been doing this.