I'm far from the "welcoming committee", but as a fellow newbie, I feel your pain. I'm sure others will chime in here with some advice on the UH1 assembly, but here's my $.02 worth-
I started with an "easy" model, say, the Douglas Skyray, which is offered as a free download. I too came from the "plastic realm" and starting with an easy model helped me get used to the new medium of card stock and various weights of paper.
I too, where possible, start a new design with the B&W version first, as this helps expose the "gotchas" of that model and helps me learn what to fix for the "pretty" colored version I do later. Paper is cheap, and the advantage of using it as a medium is you can print cheap copy after cheap copy to practice all you want- doing that with plastic models depletes the hobby budget too quickly!
The simpler models also help demonstrate the basic "order" the instructions usually have the parts assembled in. Wow, now theres a topic for debate- what do you assemble first, the landing gear, props, wings or fuselage? What the instructions lack, I am usually able to glean from a picture of a completed model, pictures/photos of the real thing, my own books on the matter, or the practically inexhaustible resources on the Web. Last but not least, and you have already done this- ask the group. I've lurked here LONG before I chose to join in the conversation, and as my ranching friends would say- you got a good herd of folk here!
I've not attempted the helicopters yet as I consider them towards the higher skill level end of the card-modelling spectrum, but there are many here with excellent advice and tricks to get the pulp to cooperate. I've done about a dozen models now, jets mainly, and am currently focusing on some buildings of my own design (they're just simple boxes with triangles on top right?).
Hang in there and welcome to the "fold"...