Anyone starting to shoot longbows, stick to wood or aluminum as Pavan said. Having trouble with carbon tuning, or porpoising, or any other crazy 400 gr up front, take a step back to the forgiving and easily tuned arrows of wood or aluminum. This seems esp true with Hill style bows. Automatically go down one or two spine weights if you think you'll shoot carbons! I spine carbons in a tester i use for wood arrows, to say most brands are stiff is an understatement, as they are made for extremely center shot and efficient wheelie bows when labeled. Throw it on a Hill style and have fun with that.
I am not against carbon, I shoot em a little, but wood is so forgiving, quiet, and even fly straight when bent...and there are a million different choices in shaft material now days available to order. I've seen the enjoyment of shooting come and go with the arrow choice, esp in inexperienced shooters trying to tune carbons. Keep it simple seems to work.
Then when you are having fun with normal, easily measured alum or wood arrows, start messing around with carbons and inserts, heavier inserts, even heavier points, nocks too tight on the string, make another string so they fit, turning the nocks, add weights that screw into the back of the inserts, add another insert on the nock, figure out how you will glue your broadheads on another set of head inserts, try and end up with the right grain weight, and don't ever short draw by an inch or it might kick again, realize they are cut too short, add weight tubes which often affect spine...FUN!