Onlines classes & designs level
Knit, purl. (Garter stitch, stockinette). Simple projects without much shaping or reading a pattern.
Stitch patterns with combinations of knit and purl, simple shaping, changing colors.
You can read a pattern and understand abbreviations. Short rows, basic cables and easy lace stitches, you have already knitted a sweater with more complicated shaping and finishing.
All of the above + colorwork (stranding) and intarsia, steeking, intricate cables and lace patterns.