How do I get python 3 on the programming section on the main menu. I have tried watching multiple videos but I can not find anything that works
The confusion here is that most Raspberry Pi Python tutorial videos were made before IDLE was removed from the default Raspbian image (in favor of Thonny, a recent development).
Thus, comments suggesting to try out commands in the videos are not helpful. If you wish to follow those videos starting from the point of opening Python 3 (IDLE), as @ben_nuttall suggested you can first get set up with:
sudo apt install -y idle3