get a basic Brother machine. Read the manual thoroughly.
Start with plain cotton fabric and make something with just straight lines, like a pillow case. Then make pajama pants.
Get a basic book or 2.
This is my favorite:. Readers Digest complete guide
Go to an indie designer web site for patterns. They have much better instructions and most have blogs and Facebook groups. I like Love Notions, Made by Rae, and 5oo4 patterns.