Hello and welcome to the forum.
Like Inky said, paper model building is cheaper the plastic (in many ways). Not only that, but there are many paper models out there that you can not find in plastic.
So the best thing to do is to find an easy model (that interests you, of course) and jump right in and start building. If you can, post a build thread to show off what it is that you are working on.
Build threads are a great way to show off your skills, as well as highlight certain problem areas that you may need help with.
Once again welcome aboard. I hope that you enjoy yourself here.
I am looking forward to seeing your work!