The first useful answer to how do I learn the Quran fast is a question back: what do you mean by learn? Three different goals get bundled into the same search box, and they have nothing in common except the word Quran. A blog post that promises one shortcut for all three is selling you something.
Mode one is reading the Arabic script — being able to look at the page and pronounce what is written. Mode two is memorisation — ḥifẓ, the discipline of committing the entire Qurʼān to memory. Mode three is comprehension — actually understanding the Arabic that you read or recite. The fast paths for the three are different. Some have honest shortcuts. Some do not. Almost everyone searching for "how to learn the Quran fast" is, when pressed, looking for mode three — and mode three has the most underrated shortcut of the lot.