One day, Jesus said to his disciples, "The kingdom of heaven is like 3x^2+8x-9."
Thomas was confused and asked Peter, "What does the teacher mean?"
Peter replied: "Don't worry. It's just another of his parabolas."
Lemon oil or boiled linseed oil are both fine. Look to see if there are other ingredients. If there are, look further. Neither oil is for cleaning the fingerboard. They are to keep it from drying out. Oiling the fingerboard might be OK once a year, but you don't want oil gunking up the surface. Your fingerboard is most likely not thirsty. Oil finishes can last for decades, For cleaning, the same as the rest of the guitar. Soft, damp cloth. Fingerboards build up gunk faster than the rest of the guitar. For deep cleaning I use 0000 steel wool. Followed by a damp cloth to remove the dust and residue.
On a finished fingerboard, like Fender's maple fingerboards, treat it like the rest of the guitar. It has the same finish so the same care is appropriate.
Anyway, this is my opinion. I believe many people use too many "products" on their guitars. Your mileage may vary.
Reverse Wound Reverse Polarity.
As a rule, I don't like the idea of modifying a pickup. I usually buy guitars that sound the way I want, eliminating the need to modify the guitar later. I also found which sounds I like best over many decades of playing. I don't have the same guitars I had 20 years ago. I had really high end, top-shelf, instruments back then, but I found a couple that I preferred and the others have gone to paying bills. My point is you might want to hold off on modifying until you have a really good idea of what you want. I will admit that in my youth I built a FrankenTele with 4 pickups and a plethora of switches for coil tap, phase reverse, pickup combinations switches, tone capacitors, and more. I ended up using 2 settings, both actually Telecaster pickups.
If you bought the guitar because you liked it, why change it?
OK, that's my grumpy old man reply. There is nothing really too grumpy, but besides the above I endorse doing what makes you happy. I you want to tinker, a cheap Telecaster is good because the pickguard and flat top makes it easy to route for different or more pickups, and the pickguard covers the nasties. All the wiring is done from the front of a Telecaster, making modifications easier.
I don't have any photos of that, but it was similar to the attached photo.