Need help with a geometry assignment!!!!! ASAP

The only information I'm given to complete this assignment is that I need to prove: If the base angles of a triangle are congruent, then the triangle is isosceles. I had to draw my own triangle, make my own given statements, and then the statements and reasons. I am totally lost and I would like some help with what I am doing wrong. I attached my work. How do I find givens for a simple ABC triangle?? I just don't know how to solve this!!! HELP!! Am I making it too complicated?? :roll: