I know the feeling. I spent 1 1/2 hours in the store yesterday trying to put fabrics together for 2 lap quilts. However, sometimes I think I just over think it. Ha. I start with trying to find a print I really like as my main fabric to be used on one side. Then I look for colors I want to pull from that print to use on the other side and go down the rows of fabric looking for different prints (in various sizes) and solids that work together and are pleasing to my eye. Sounds simple but usually isn't. I often find 2 fabrics for the strip side I like but can't find a 3rd one ... put everything back on the shelf and start over looking for a new inspiration fabric. Crazy, right?
I'm new to quilting as well and right now am making simple strip quilts (in a lap quilt size) that I donate to a local nursing home. Let's me develop my quilting skills and "give back" at the same time. I spend a lot of time looking at quilts on Pinterest, this board, and other sites to get inspiration, especially how colors are used. I suggest you keep quilt patterns simple. There are so many gorgeous quilts out there but I know "I" am not experienced enough to tackle a lot of them. Keeping the patterns simple, researching color combinations that I like, and making smaller quilts allows me to finish a lap quilt quicker and builds my confidence to keep going.
Gook luck!