Funny dmun!
You forgot to add, do it a hundred times!
I still have no masonry skills, yet mine is still standing. Ken got his skills from his father-in-law through his wife's love. Power tools don't get me too excited, though I like to look at them in catalogues. Have no fear. You can do this. Questions are easily asked and answered around here. Choices made along the way are more difficult. Those, you have to decide for yourself.
A mason will cost you big bucks for something you can do with a little time and effort. In the end, telling people that you did it yourself is more rewarding than just having it to use. Keep reading. You'll see how many people are totally captivated by building ovens. If you have trouble sleeping, though, it might make it worse. It totally consumes you. Have fun! It's only time, a little money, and a challenge that you'll be happy you stepped up to take on when you're only 10% of the way into it.