You're asking the wrong question and you'll get 1001 shitty opinions for it. There is no methodology for how to waste your life better - you haven't mentioned

You're asking the wrong question and you'll get 1001 shitty opinions for it. There is no methodology for how to waste your life better - you haven't mentioned your goal a single time. Learning without a goal is for idiots and public education, created by idiots for idiots. Figure out what problem you want to solve in this world, in this short lifetime you have. Specializing in a field and doing something worthwhile will take at least 10 years, so assuming you're in your 20s, you have one or two chances to do something worthwhile in your lifetime before you're old and finished (everyone after 40). One more thing - you have 2-4 hours of actual brain-activity in you, so do the napkin math, you have far less time to do real brain-stuff than you think, because you'll have to work for a living and most work demands you spend your brain-activity on stupid worthless shit such as building websites or another phone app that does the same thing 10 other apps do. Knowing that, your #1 goal should be avoiding that scenario at all costs. That likely involves attending a highly ranked University to increase your chances of getting to work on research. Knowing that, there should be no time left to self study and your original question becomes meaningless.