Sewing 101: Measuring, fitting, and patternmaking
If you’re using the tutorials on this site, please keep in mind that almost all of them are intended to be used with stretch fabric (t-shirts, knit, jersey, interlock, etc.). Why? Because the fabric stretches, you can be a lot less accurate with fit, and you don’t need to mess with darts!
If you’re a decent seamstress, you can probably adapt some of them to non-stretch fabrics pretty easily by adding an inch or two here and there, and by planning for some sort of closing/opening device (zippers, buttons, etc.).