Make a story board first, with all the shots (scenes), and camera angles (including different camera angles for the same scene), with the dialogue, any extra equipment such as lighting, costume changes etc.
In other words, have it all drawn out in a linear fashion, with all the details and notes with the scenes where the information goes.
Prepare to take many shots of the same scene so that you will have lots of choices to pick from.
Edit well.
Think about what music will go with your film, and make sure that the music is timed correctly.
The dialogue is likely to be overdubbed in (because of the multiple shots of the same scene, and the multiple camera angles). Have a good professional studio to record the dialogue, and the “extraneous” sounds (like footsteps, rain, phones ringing, things being set down onto different surfaces, doors being knocked on, cars going by etc.) Make sure all of the dialogue and sounds are edited in flawlessly, and seamlessly.
Make sure your graphics (credits and title) are easy to read for the format for which the finished product will be seen (phone screen, tablet or computer screen, TV screen, movie theater screen). Make sure the graphics are on the screen long enough to read them, but not so long that it “seems like a long time” to the viewer. The graphics should be readable, pleasant or interesting, but not distracting. Don’t cover someone’s face, or a sign (because of the distraction of the lettering) with graphics.
Have your actors rehearse. Sometimes you will want to change some dialogue, camera angles, setting, costume, or scene order by what you see in the rehearsal.
You don’t have to shoot the scenes in order, but mark them on the film/video so that you can find them when it comes time to edit. That is what those snapping things are that you see in old movies right before the director yells, “Action!” But your film/video can be marked, and time stamped within the camera these days too. Your story board should reflect these same scene numbers, even if you shoot out of sequence.
Watch out for minor distracting things in the background of your scenes such as someone walking through in the background, or objects that don’t fit in with the scenes, such as an object, or piece of filming equipment that shouldn’t be seen (like the cameraman’s Starbuck’s cup left on a table). Watch out for microphones, booms, and lights, so that you can’t see them in the edited version of the film.
Check the pacing. Make sure your pacing is correct for your particular film, so that it feels natural, rather than forced, or awkward. Lulls are OK, as long as they fit in with you pacing.
This sounds like a fun project. Please let us take a look at it when you are finished : )