10 years is actually considered not bad by most academic standards. The core ideas of evolution via selection, genetics, and population dynamics (the kinds of things taught in any general biology class in high school and college) really haven’t changed much in 25 years.
You may want to find a biology class and learn about the vocabulary, founding principles, and big ideas. Here is a free open source biology textbook, chapter 18 starts the unit on evolutionary processes. And keep watching YouTube! There are tons of good videos aimed at different levels. “Crash Course” with Hank Green is fantastic and the series covers many academic science topics as an entire course. Biology alone has 20 or 30 ten-minute episodes.