I was going to check your step number 4 out but my cell phone does not list cc's in the unit conversion this thing (the phone) must be a piece of junk
I am glad to see that you are doing some safe & simple reloading. It can become more complex though as one can tend to become more critical of all aspects of the case prep once they get a good foothold.
There is no strait conversion from cc to grains. It is different for each powder.
The Lee powder measure and dippers are labeled in cc.
Each Die set comes with a list of common loads and shows staring charges in grains or cc.
Also my powder measure has a conversion chart for must powders.
The dipper is usually the starting load for the most common powder. Makes loading about as hard as making coffie.
Reloading has become very complex for me and my 1/2 moa rifles.
Trickleing compressed loads into sorted brass seated out near the lands and all.
This little prodject was a relief.