How do you sew sleeves up without puckering?

Yes, you may make a picture cover.

Sure! How about long gloves to make up for the lack of sleeves?

It's best to use a sewing machine. A good, heavy duty, sewing machine is useful when working with denim, as the layers of fabric can get too thick to sew...

Follw the instructions in the article. A sleeveless top with a comfortable armhole fit can be used as a template. Pin to the garment to be adjusted and use dressmaker's...

It's best to have your elbow slightly bent when you're taking a sleeve measurement. Your sleeve will ride up a little when you bend your arms, and if you take...

It may be because of the texture of your sweater. Instead, try putting on a jacket or something that will feel different on your arms.

Use bonding web, or iron-on fabric glue, to hold the patch in place. However, since that isn't a permanent solution, you still need to stitch the patch down.