I'm glad what I said could have such a positive effect! You got from it what I hoped you would. In my opinion becoming a freethinker in the lifting world is the best thing you can do because you will figure out what's best for you better than anyone else. You said yourself you think you read and think too much about lifting; you clearly have enough information stored up there than and you have the experience, so you'll be able to de-engineer you're old methods that worked and apply knew things you've learned since than to evolve yourself. Fuck going back and taking someone else's square one path because you're "supposed to" lol.
And if you are overtraining, you'll figure it out yourself. You're body will tell you and you'll adjust. But until than for all you know you're doing what's perfect for you, so go for it.
And just looking back at Frankenstein... hey even he had to fail countless experiments before he could find the right "formula" to make his monster. He didn't waste time and just sitting and thinking about that perfect formula, he went out, experimented, and evolved his methods. You'll find your optimal way to train sooner or later lol
And don't worry we're all overthinkers whether we like to admit it or not.