Learn Fundamentally
Fundamental knowledge means that you've learned a subject in a classical way, in the right order, with no gaps. For example , if you learn fundamentally about organic chemistry, you 1. learn the topics in the classical sequence: alkanes, alkenes, alkynes; and then add functional groups: alcohols, aldehydes, ketones, acids, ethers, esters, amines, amides, proteins, and sugars. 2. understand the main concepts: nucleophile, electrophile, dative bond, Lewis structure, VSEPR Valence shell electron pair repulsion, etc. With fundamental knowledge you have a good foundation to build on, and you can understand specialists, have a common language with the scientists. Here are a few of excellent channels to explore and build Your knowledge fundamentally on each topic: 1 - Organic chemistry - 30 videos sequence, free Organic Chemistry Exam 1 Review - YouTube 2 - General Chemistry - all the elements in the periodic table by groups: Periodic Table Part 2: Alkali Metals (Li, Na, ...