Agreed with Matt and Russell.
The numbers usually recommended for a cycling tank with fish in it are <0.25ppm ammonia and <0.25ppm nitrite. Nitrite at 5.0ppm can slow or stall the cycle.
Nitrate is not critical, but >80ppm is considered high. It'll get under control as you control the others. Prime with water changes and any time you see high ammonia and/or.nitrite.
The film is probably a common protein film which you can skim off. But it indicates an unequal distribution of water from your filter being on one side. Some tanks have this problem; some don't One way to equalize the flow is to use two mesh dividers with the filter and heater between them. Done right, you can also hide the filter and heater.