I sewed clothes for many years before starting quilting and in my opinion, quilting is easier because for the most part it's straight lines. In clothing construction, you have sleeves, necklines, darts, waistbands, etc. Someone suggested making PJ's as your first project and that's an excellent idea! Jo Ann's often has patterns for either 99 cents or $1.99. Get one of those patterns and some cheap fabric and make them. McCalls would be a good pattern company to start with. Look on the back of the pattern envelope. It will suggest fabrics that are good to make that item as well as notions (elastic, buttons, etc.)
You are a very smart lady and will pick up clothing construction in no time. You'll also have fun making clothes for your kids.