Yup, its intimidating .. but, continue with the Helmet and when you are done with that you will have a good feel for how things go together.
After that, work on the Biceps. They are pretty easy to assemble. Then you will start to gain your confidence and your motivation level will rise as well when you start to see it come together.
I can not tell you how many days I psyched myself up all day planning on what I was going to do when I got home and when I got home and went to the basement to work on my stuff.. i would stand there and scratch my head ..LOL
Just take it slow... DON'T RUSH IT .. and use E6000 ...