I try to learn how to use a transistor and how to calculate the necessary resistances. Here's what I calculate for the moment. I do not know at all if I left properly and if my equations are good. I think the equation for R2 is not good. How should I go about it? I also learn to read the data sheet of a transistor. Any help is welcome. Thank you
EDIT: it's WORKING
using factor of 10, using β = 100, R1 = 55Ω and R2 = 1325Ω precisely using potentiometers ... The LED does light when I connect a voltage 3.3 V on the base of the transistor, success.