Projectors For Dummies Please Explain Television Types To Me - In Basic Terms?

Please explain television types to me - in basic terms? - projectors for dummies

I want to watch TV. I have no idea what the difference between HDTV, plasma, projector, TV, etc. Size is it was a problem with one of these? Better value for the other? What keeps the longest? She did not name the brands, but please, when you choose it. I am a fool when it comes to these things! Thank you!