KISS to start with.
-temp and PH of mash important, so get yourself reliable meter and thermometer.
- water; yes very good to know where you are starting from. if city water you want to throw campden tablet in to remove chlorine.
- pick a two malt recipe...base and some specialty maybe.
- yeast; perhaps go with a dry yeast like US-05 first time. forgiving strain, and focus on pitch temp and maintaining fermentation temps in 60's. just trying to get yourself familiar with the process at this point.
- sanitation; that's important with any brew
- some point consider water profile software like bru'nwater, and recipe software like beersmith....invaluable.
- relax, take good notes, and just go through the process. it may seem overwhelming at first, but it will get easier and routine after time.