Anybody know how to sew?

[shootingstar]

Ask sewing machine store how to thread the sewing machine model that you are buying. Try it several times in the store there. Each machine model is different.

Instruction booklet will be provided how to fill bobbin thread, ask that too. It's just faster for learning to have someone show you first.

Then you can repeat/memorize by using instruction booklet at home.

You're ambitious --a shirt.
Try first pillowcases, bed comforter cases, cushion covers, placemats, simple camisole, sleep kimono....simple straight line sewn items. You could even do a machine-sewn quilt. Just be prepared to do alot of ironing for each seam sewn to iron out the seams flat, so whole sewn fabric patchwork lies flat. Whatever you do, better to choose a little project that is successful first.

Sometimes specialized sewing machine stores, offer classes. Do you know a neighbour, etc. who you could occasionally contact for questions/demos?

One good beginner's course would accelerate you alot.
(I used to sew alot for about 10 years: I sewed nearly 80% of my wardrobe. I can do tailoring --jackets with lining, bound buttonholes, etc. Then cycling passion bit me. I still have my sewing machine which I use for alterations since I'm petite. This alone is worth keeping my machine since I hate spending money on things/services I can do myself. As for sewing clothing, never say never. But yes, I would find a cycling jersey, not difficult to sew. I'm just lazy.)