I think you should read everything you can. In my case, by the age of 10, I'd read every book in the Omaha public library about investing, some twice.
You need to fill your mind with various competing thoughts and decide which make sense.
I happen to have a talent for allocating capital. But my ability to use that talent is completely dependent on the society I was born into. If I'd been born into a tribe of hunters, this talent of mine would be pretty worthless. I can't run very fast. I'm not particularly strong. I'd probably end up as some wild animal's dinner.
Market price, while used exclusively to value our investments in minority positions, is not a relevant factor when applied to our controlling interests.
It makes no difference to a widow with her savings in a 5 percent passbook account whether she pays 100 percent income tax on her interest income during a period of zero inflation or pays no income tax during years of 5 percent inflation. Either way, she is 'taxed' in a manner that leaves her no real income whatsoever. Any money she spends comes right out of capital. She would find outrageous a 100 percent income tax but doesn't seem to notice that 5 percent inflation is the economic equivalent.
As an investor with small capital, one should prefer businesses that have high returns on capital and that require little incremental investment to grow.
The truth is that I've got all my net worth safely in Berkshire and I will never sell a share so there is no one more concerned about what happens after my death than I am.