How do i upgrade my htc hero to android 2.3?

basically i have a htc hero running on android 1.5, now all i want to do is upgrade it to android 2.3????!!! why does it seem so technical? i have been on the htc website to no avail, went on youtube and its going on about unzipping compressed files and downloading a file to download android which i cant find anyway! all i want to do is plug the phone in and download can you guys help please! quite frustrated. (btw im no computer expert) please help!