As a photographer you don't need to understand the mechanics of architecture, but you will need the feel for it, have an eye for the details.
I have been into the field of professional architectural photography for more than 20 years and one thing I have learned to be most important is to understand my client, the architect, and be able to translate his view onto his design into my photograph.

There are 2 diferent views between the view of the guy who designed it, the architect, and the guy who built it, the construction firm.
I have been working for both and came out with diferent shots for each of them.

If you want to take photo's of architecture just for yourself, just go and shoot and develop yourself using whatever gear is available to you.
The best would be the TC, but for developing yourself you can use any camera from 35mm upwards.

Peter