Be willing to make mistakes and take the time to fix them. Get a seam ripper you wouldn’t mind writing a novel with; it’s just as important as sewing.
Try a sew-along! It’s a nice way to learn the larger process, meet some helpful folks online, enjoy the community that sewing builds.
And speaking of community, buying that fabric and machine locally helps you meet the folks around you who share your secret hobby. Buying from a place that also supports repairs and warranties makes sure they will treat you right when you need that service.
And that they will be there when you need them.
If they don't treat you right, tell them. If they do, tell them that, too.
*Ed Dees has made me several things, all of which I have paid for. He uses good materials and takes special orders.