You picked an excellent beginner project. And, you have a website that makes following her directions very easy.
If you made the straight/railfence blocks from one color way - - or even a different color way on each of those railfence angles, and then used "scrappy" for the nine patches, you would be able to use your stash and have a very nice quilt.
I have done many quilts from Claudia's QUilt Shoppe, including buying her book because I have found her simple, straightforward directions to create a fine quilt that looks as though I had done something far more intricate.
THe best way I know to get "experience" is to DO IT. And, this quilt will help you feel very capable and learn alot about making a quilt.
Go for it - - and use what you have on hand.

As it is laid out in the photo I don't care for it, but I love scrappy quilts and I think it would perk it up quite well.

That's a great beginner quilt and all straight stitching.

I think it's cute. It should be alot of fun to make. Can't wait to see it. Please keep us posted on your progress.

That's pretty and I think it would be pretty easy, I say go for it!

That is an excellent pattern, looks really fun to do and when done it looks more complicated than it really is.

I think it's a great quilt to make. Someone here made a beautiful quilt with the blocks like this..

Great pattern. I never made it........ yet, looks fun. Go for it. Please show us how you did. We love pics.

I actually have that quilt bookmarked to make myself!

The pattern is really easy. The hardest part (but not that difficult) will be lining up the seams in the 16-Patch blocks. The Rail Fence blocks will be super easy. Just be precise with the rotary cutting and the seam allowances and it'll come together nicely for you.