Welcome to FISD!
First of all, you should be figure out, what Kind of Stormtrooper do you want. ANH, ESB or ROTJ?
Then you should look, with which Armor Maker you wanna go. There are plenty of Vetted Makers. You can find the List here: http://www.whitearmor.net/forum/index.php?showtopic=11538
I think, that is the First thing you have to do.
So far it looks good.
When you try out the Shin, or want to look where to trim it, do it with your Boots on.
It could happen, that you will have a Big Problem later, that they do not fit anymore, or even worse, you can`t close them in the Back.
Welcome to FISD.
And for your question, it is not a great challenge to go for EIB with your first Build.
I did it with my first build. Just look for the Details, when you but the Armor together, there are plenty of Informations around the Board.
And if you have a question, don`t hesitate to ask.
Hi! I know, it is not a requirement for EIB, but your Ammo Knee Belt would look better, if you mount it the right way. It is mounted to high I think.
Here are some Reference Picks for you: http://www.whitearmor.net/fisd/Tikipedia:ANH-Stunt:Knee-Pack:ReferenceGallery
And I don`t think you have enough Plastic left, to cut the Round Corners on the Bottom. It is not a requirement but it would help to make a improvement to your Armor!