All the tutorials I watched are showing how to add posts to as part of the MENU or as a drop down list in the menu, but when you are at the home tab you can see your posts as a picture and a subject, is it possible to do that under other MENU items?!
Are you asking if you can have thumbnail images and titles in a dropdown menu? It’s probably possible. But unless a theme offers this itself (and I don’t know of any offhand that do) you’d need to do some significant fiddling around to make it happen.
ETA: Just because I don’t know of any themes that do doesn’t mean that there AREN’T any. There very well may be given the number of themes that are out there.