provisional cast on. Knitting tip i have been trying to find for ages makes a cable pattern easier to start without the weird squishy appearance at the beginning and allows you to unravel the yarn for a seamless sew up later on Набор петель косичкой
best, clearest video for making a Russian Join. I& used this several times. You may need to have a few different size tapestry needles as you want a needle that is slightly smaller in diameter than the yarn you are working with.