Can I change the Freya font to my desired one.
What's the easiest way to change my fonts?
If I get google web-fonts or some professionally simple fonts.I am really happy to use it .
Yes, you can change system fonts using Elementary Tweaks: https://launchpad.net/elementary-tweaks.
Install gnome-tweak-tool
from software center. There you can change fonts.
Install font-manager
from software center, there you can change fonts:
From manage fonts option you can install fonts as well.