French seams give the wrong side of a garment a clean, finished appearance. This is an especially useful finish for very lightweight or sheer fabrics where a zigzagged or serged seam allowance might be visible. But it can also help
Sewing Knits - The Dolmaniacs Sew-along starts with a tutorial on different ways to get the best results, particularly on a normal machine. Different adjustments to make to your settings, different types of stitches and more!
5 More Sewing Tips for Professional Results. Advice to make your sewing projects easier and more fun! I would suggest getting Gingher scissors and Presencia thread. Quality tools makes it easier to sew.