If you do a base install of Debian with no graphical desktop, you'll only have the console terminal. You can change this font to make it larger.
dpkg-reconfigure tool to update the console.
sudo dpkg-reconfigure console-setup
When you run it, it will ask you
- Encoding: UTF-8
- Character set: Guess best
- Font: Try Terminus or Terminus Bold with framebuffer
Try out different fonts to see what works best for you.
You should now be able to resize and change the font for the non-graphical console in Debian.