Which Film to Use ??
It really doesn't matter. But, what are your preferences ? Some films are "warm" others are "cool" Saturation or sharpness? what is your goal? Fast films are not as sharp as slower films.
B&W ? Color negative? or Color Transparancy? What I have learned over the years is this. Pick a film to use, and learn it well. Latitude of every film is different. Learn how to use that film that you like and learn it well. What are the limits of that film ? Color Slides are not as forgiving as Color Negative films. FILM IS NOT DEAD... !!! I have worked ( as an electrician ) in many huge factories and other huge companies. I bet you never knew that in the scientific world that companies like General Electric use cameras that can shoot: 20,000 frames per second, 40,000 frames per second, and even as high as 120,000 frames per SECOND!! this was the technology in 1974. And it is still in use today. Huge process cameras that take film sheets that are 30" X 40 " !!! There is much that goes on in the "WORLD" of photography, that most are not even aware of.
GOOD LUCK.. learn to create. practice practice practice is the best advice I can possibly give to you. There is no shortcut to EXPERIENCE !!!