UV resin is toxic when uncured. Do not breathe the fumes or get it on your skin. Use provided nitrile gloves when handling the printer, resin, or any uncured prints.
I (Chris L.) have tried wearing an N95 mask when working with the printer before, but have, anecdotally, found it unhelpful in cutting down fume exposure. My suggestion is to get a strong breeze going in the room and work quickly to minimize exposure.
Resin prints require some post-processing after they are done printing; scrape the print off the bed and directly into a cup of rubbing alcohol. Swirl the cup around gently but vigorously. You may wish to repeat this process with fresh alcohol once or twice.
Rubbing alcohol can be found in the plastic cabinet on the rightmost wall of the circuits lab.
If you are printing anything hollow, make sure to include a drainage hole in your model for the liquid resin to escape from. Otherwise, liquid resin will be trapped in the cavity and will eventually leak (or explode!) out from the print. Alternatively, print your model completely solid to ensure that liquid resin cannot be trapped inside. This will use more resin, but will not increase print time, since the entire layer is cured at the same time.
The default per-layer exposure time is 5-6 seconds, but John suggests setting it closer to 10 seconds. Chris L. has had good results setting it to 8 seconds, but has always followed prints up with a blast from a UV flashlight after they have been cleaned up, as they do seem to be slightly gummy.
Do not use the UV flashlight near the printer, to avoid the risk of accidentally curing the resin in the tub.