"The secret life of plants" is perhaps the best way to start learning about life.
It's a beautiful documentary but it is quite long which is sad for the valuable point it makes. I cant think of anything that could be more important.
There is much more to learn about biology, the mind and it's abilities than "just" thinking, feeling and communicating plants. This video should provide you with the necessary inspiration to start searching for other documented facts people some how forgot to share with you.