Group sessions. College was too poor to afford personal training time
Lana, a great way to start out is swimming. Water exercise is a great cardio-builder.
And - never under estimate the power of skipping (jump rope).
My first month was hell - it was exercise, exercise and more exercise. The only times I was let into the ring, was with my hands tied behind my back. The coach had me don headgear and told the spar-man to punch my lights out!
So I had to avoid his gloved fist by dodging my head - that
was how I learned "defense" (and the art of movement)... :chuckle