Well, you have to just print out the pieces and glue them together and hope for the best XD. These models are pretty easy and are a good place to start. They can be downloaded here: [link] Best of luck!
I used "print multiple pages per sheet" so that two pages were shrunk down to fit on one sheet of paper. I needed to practice working with details and that's what I cam up with. I made a lot more after taking this pic: [link]
Sometimes I put them in obvious places and wait for someone to take them to see their reaction but most of the time I find a very "appropriate" spot in the hopes that they stay there as long as possible (as in, people think they belong there. I'm working on some elaborate Disney papercrafts to leave in Disney World and it will be interesting to see how long those stay there lol.
Yeah, it helps with the detailing and makes it look more perfect. After you cut it w/ scissors, there is lots of stray white slips especially in corners where the scissors can't go. You can see the white marks when it all glues together unless they are shaved away, but you do a really really good job with just scissors. Keep up the good work!