Check the fuse for the alternator, because for an alternator to work you have to suply it a 12v feed (the little wires) k11's have issues with the connectors on the fuse block corroding, also does the battery light illuminate?
Worth a try, only other thing I can suggest off the top of my head is was it raining or anything as the ecm's often get water dripping down into them from poor sealing firewall. Check ecm for corrosion internally lol. Although ear muffs sounds like a way easier better plan :p
The correct way to check oil level is through speedo/sensor hole anyway so might as well do that. As there is a concern of overfilling via fill hole causing difficulty to engage gear
The reason there is no codes is because your using a generic code reader, some of the nissan specific codes are not shown on generic ones. Id advise getting it checked by a diag computer peferably by main dealer
There not normally a problem, you might want to check for foreign objects in the fuel tank, that are getting into pump, and that the filter on end isnt blocking quickly
Im in a main dealer college, but in my opinion you learn a whole lot more in a workshop, the scrapyard sounds like a very good start. I started helping my mate build banger cars for racing. Just ask around at local garages and speak to the old techs lol :p they know way more than any college tutor.
we are a nissan main dealer so see alot of micras, and we had a difference in opinions so we asked the ministry themselves, they said it was a pass and advise only, as it is not structural