if you can read you can do it. I did the heads on my 74 Olds when I was 16 and 1 months before that coouldnt even put a distributor cap back on. I got done the car ran and didnt have any headgaskets leaks. Get your torques right and in the right sequence and your golden.
PS....be very careful taking out the old cam and putting in the new one, you dont want to ding/mar the cam bearings. I would get or fashion a cam r/r tool to help with that