Roses are actually better on their own rootstocks. To start cuttings is easy. Take a stem of 3 or 4 buds, at least 2 or 3 buds below a flower, and pot up in a gallon pot with good potting soil, leaving 1 or 2 buds above ground. Water well. Put a couple of small stakes, I use bamboo, in the sides, so that you can put a plastic bag over the top to form a greenhouse. A large glass jar works too. Set the pot outdoors under a shrub or trees so that there is nice light, but no direct sun. Growth will start within weeks, and you can gradually move to sun. That's it, and any suckers that develop are true. I've started as many as 3 or 4 in one pot.