Pinholes with VC papers -- no need to over-think it, just go out and do it! It is pinhole photography after all! Check the pinhole sites for their recommendations for starting points, but there are so many other factors (size of the pinhole, how far from the pinhole to the film, etc) that one might as well just jump into it with both feet. You have reciprocity failure effects, too. So forget about "tests" and go out and burn some paper! Try different filters! Keep notes so that you can repeat the successes and hopefully not repeat too many of the "failures".

Go out and have fun!