If you can borrow a machine from a friend or relative and you can only work at your own schedule, you can probably learn to sew from a basic sewing DVD that also covers basic sewing machine skills. The one I like is Studio Sewing Skills by Connie Crawford -- it's basically the elements of first year design school sewing in a can, taught by an experienced teacher, and covers all the basic parts of machine operation, fabric grain and layout, cutting, and sewing various garment types. It does not cover home dec sewing.
http://www.fashionpatterns.com/index.php… As an experiment, I loaned it to a couple of 9 year old cousins with access to Grandma's treadle machine, and found them an appropriate size camp shirt pattern (the basic project in the video is a camp shirt) and turned 'em loose. They both made credible camp shirts (better than most 9 year olds manage!), though I did do the buttonholes for them on a modern machine. Or if you're a book learner, head to the library for a handful of basic sewing books and teach yourself.
The reason I like Connie's sewing book and/or DVD are that she did teach the technical side (sewing, draping, patternmaking) at FIDM for many years, while continuing to be a patternmaker in industry. (Patternmakers are pretty much top of the heap -- they can get designers fired, and do.) Once you've learned the basics of various sorts of constructions used for different garments, you're ready to start improvising designs. Connie's patterns for Butterick are often scarcely-disguised basic patterns (called "blocks" in the industry) meant for taking and redesigning to your own purposes. Here, for instance, is the basic blouse block: http://butterick.mccall.com/b5300-products-9628.php?page_id=156 -- boring, right? Well you can turn that into these designs fairly easily: http://voguepatterns.mccall.com/v1271-products-15134.php?page_id=858 http://voguepatterns.mccall.com/v1272-products-15135.php?page_id=858 http://voguepatterns.mccall.com/v1269-products-15132.php?page_id=858 Here's the basic princess seamed jacket: http://butterick.mccall.com/b5574-products-13464.php?page_id=156 which is the basis for: http://www.marfy.it/ENG/activenews.asp?idcat=63042&idart=64636&azione=detail&layout=standard&cid=A151L156L220120817000534OJTOKQVNNHA05534915 http://www.marfy.it/ENG/activenews.asp?idcat=67754&idart=69342&azione=detail&layout=standard&cid=A151L156L220120817000534OJTOKQVNNHA05534915 http://voguepatterns.mccall.com/v8767-products-15147.php?page_id=850 http://voguepatterns.mccall.com/v2859-products-6080.php?page_id=850
So yeah, I'm with your mom... learn to sew, learn your basic fabrics, explore techniques like underlining with silk organza or tailoring, and then move on to redesigning from basic blocks or draping (draping, done well, is usually considered a higher level skill -- it's what you often see happening in the workroom at Project Runway).
Start reading, too: I'd suggest reading at
www.fashion-incubator.com
www.costumes.org
www..threadsmagazine.com (and the magazine itself!)
for starters.