I know how you feel, but I have been temping for a couple of years now and here is what I do.

Don't worry too much about all the jargen, just start taking your temp and recording it.
To start:

Get a pen and a piece of paper and put it on your bedside table
Make sure your thermometer is there too
Take your temp orally or vaginally ( I prefer vaginally)
Write your temp, with the time and date.

During the day observe your cervical mucas (cm)...take a note and put it next to your temp for that day. Some times it is hard to judge your cm and this takes practice.

After a few days put your information into FF

Notes:

Take your temp when you wake up in the morning before you move. Try and take you temp after a good 3 hours of sleep. This is hard if you are up and down with another bub. Note in FF any things that may affect your temp such as lack of sleep, drinking, illness.

Don't obssess over a couple of days of temps, it is the whole cycle pattern that is important.

It may take a couple of cycles before you can see a ovulation pattern.

After you are confident with this process then start reading...FF have short course

HTH