the CFI said to me "Ok your stalled" and I thought i was still at MCA, I genuinely did not know i was stalled !!
Two things here, first - MCA?? I have been flying a few years and the only abbreviation like this I know is Vmca, and this applies to twins, so not sure what you are talking here.
secondly - normal (academic) stalls are done by maintaining level flight, if you start descending then you raise the nose to stop this, if you raise the nose and keep descending this normally means you are stalled.
As far as AoA indications go, yes this is good, but you need to have the indicator where you WILL see it, otherwise it is as useless as the light!