It's funny that even out "our age" we still find things out about ourselves. I would say that reading about the brain is both fascinating and, at times a bit disturbing. I have been fascinated by how the brain works (or in some cases, doesn't) since I was a teenager. I read Psychology Today magazine from the time I was 18 to well into my 30s. I minored in Psychology in college.
I said all that to say this: Be careful with going down this rabbit hole. In my few years of deeper study into this, I formed a strong opinion and then when discussing it with some others (my favorite psych professor and others) found out that they felt much the same, and that is this. In this field are some of the brightest minds you'll ever encounter. And, some real, for lack of a better word, psychos! (Ok, maybe not psychos, but weirdos for sure!) And the while there are varying degrees of these two, there doesn't seem to be a lot of people in this field who fit into the more normal middle ground between them. Psycho is extreme, and not really what I mean, but neurotic is an understatement for many people that I met or on a much larger scale read/studied in the field.
I always thought the TV series Frazier was absolutely brilliantly written, and not just because he was a great character on an all time great show (Cheers) but his show also became one of the all time greats as well. But that show really showed how neurotic and in many other ways "quirky" people can be in that field of study. In fact, it's fairly well known that it's not uncommon for people who study the brain for years to eventually drive themselves to a mental hospital. I'm just saying, be careful what you read. As much as I loved this field, that's what eventually drew me away from it. I remember the last year of my subscription to Psychology today, it seemed like for every truly fascinating article or study that was written about, there was one that was just weird, and many times disturbing. I saw replies that "the psychologist who wrote the article is more disturbed than the subjects he's writing about" type things.
My suggestion as a friend, is to stay on the 101 level of this topic. If you get very deep, it can get weird fast.