You might be an amateur but it's commendable that you took on this advanced undertaking. The only reason I did mine was because I was a mechanic many years ago so it wasn't scary for me. Most people would just throw money at some garage so the problem would just go away. You won't have to take your heads off and as a tip; next time follow Makulocos video to the tee even if you have to do it as you are working, also; vice grips on the cams will keep them from spinning. I'm am thinking about getting a couple long ones and grinding the jaws down a bit so they will fit in between the lobes and then bunjying the ends to the exhaust manifold because you never know which way the cams are going to spin a bit. Now that you have time while waiting for the tool you can study Makulocos videos carefully. Don't worry about pulling the heads, you won't need to. You can throw all the parts in a box, crank the engine over a few times, and still get it all back in time. Just take your time and study up on it.
There is a place at the front of the cam to put a large set of vice grips, makuloco doesn't use them because he knows how to neutralize the cam after working on many of them but when the time comes for me I will surely be using them.