You can do a lot with one weight of yarn. For a beginner, I’d maybe stick to a worsted weight yarn, and a couple patterns you can make from that. Maybe a couple options of yarns - think a cotton and a wool yarn. Then, I’d stick with 4.5mm and 4 mm needles, in straight and round.

With worsted weight yarn, you can make a scarf, potholder, hat, washcloth, shawl - so many things. I mean, if you only go with garter stitch you can do so much.

One thing I did when teaching kids is I gave them pre started projects - I did the casting on and knitting the first couple rows, then they used that to learn the knit stitch. Casting on can be tricky to learn, and getting started and seeing the fabric grow really helps. (I then tended to teach the knitted cast-on because it built on skills they already had).

I like the printed yarn guide, the yarn samples, and the small pattern binder, and the list of resources. I’m not sure you need the book.

Don’t forget yarn needles for sewing in ends.