As I am certain you are going to follow D-Rick's excellent advice, I'll add the following.
After you have your script and before you set your schedule - try to get in as much story boarding as you can, even just stick figure sketches. This will help you visual the characters in space, and give you the opportunity to brainstorm rough compositions and shot ideas before hand.
If possible, scout your locations before shooting and take pictures. Have the more creative folks look for their setups, and fiddle with blocking ideas. Have the more organized people on your team looking for things like parking problems, bathroom access, nosey neighbors, or any number of other logistical issues that might come up. In fact, I just want to stress here that if at all possible find someone to act as your "UPM" or "AD." Having someone dedicated to helping you with logistics
while you are shooting makes a tremendous difference even at the "first timer" scale.
At some point you will want to establish a rudimentary shot list for your script, and schedule out your time based from that. It wouldn't hurt to do a few overhead sketches of your more complicated setups. Basically a top down view of your set, showing camera placement, lights, actors going from point a to b to c, or whatever is needed as determined by the shot. Probably not necessary for every shot at this point.
Ace also brings up good points. Take your time pre-visualizing (story boards, location pics, shot lists) the film you want to make. Having a plan going in will give you more time to take shots of opportunity - like when the last rays of usable sunlight are streaming through the dusty windows in a way that weakens your knees - or whatever.
Having said that, try not to get too bogged down in Pre-Prod. at this point. It is immensely important, so do enough to get your plan, then execute the plan. You'll find out what parts of your plan worked, and what didn't - which will result in a better plan and (hopefully) better film in the next round. At the beginner level I have seen a few projects where Pre goes on way too long, people end up dropping out for a whole host of reasons and need to be replaced, and so on.
Also, for just about any piece of basic camera rigging you might want, there are usually several DIY or even no-cost solutions. Wheelchair's make great dollys, for example. There are more DIY steady-cam designs for small cameras than I care to count. Your operator can stand on a big folding step ladder if you need a high angle.
For example:
Skateboards on smooth surfaces are also good if your shot calls for a low angle dolly or something. I used a skateboard with a bolex on a high hat in college, then carefully wheeled it along the edge of a building roof to look down into a narrow space between the two buildings and dolly with the character walking down in the corridor.
In the long term - read, watch, read, watch, read, watch. Everything you can get your hands on, with reading - anything, film related or otherwise.
Edit: Sorry if that was rambling, long day today
I forgot to mention one last thing: You said you were doing a film this summer? How long of a film are you considering? Might I preemptively suggest short subjects?