How can I get a larger font for Windows 10?

A font is a file of instructions telling software how to draw letters. The software can draw them any size. So you have to find the tools menu in your program and select the size you want.

I suggest you click all the items in your tools menu and see what options you have. Windows has a menu of menus called "START" and then click "CONTROL PANEL". You don't have to memorize everything, just notice where they are. For example there is an option to turn your monitor sideways so you can have a tall picture instead of a wide picture.