someone talk me through propagating rosemary from cuttings?

Take soft new growth in late spring or early summer, about 4-6 inches long, cut just below a leaf node. Strip the bottom couple of inches of leaves, dip in rooting hormone if you have it (it helps but isn't essential), and push into a gritty mix - half perlite or sand, half compost. The bit that catches people out is overwatering. Rosemary rots far easier than it dries out, so keep the mix barely damp, bright but not baking sun. Roots in 3-6 weeks; a gentle tug that resists means you're there. Do 6 or 8 at once, not all of them take.