I went to college and have a degree. However some of the best learning I did was off the street. Listening to musicians teach tunes to each other. That's a true lesson in analysis! Someone on a bandstand teaching a tune to a bass player in a about a minute. That always blew me away and I learned a ton from that.
I used to play (and study) with a great guitarist (www.stevegiordano.com) Steve Giordano. When he would teach me tunes and originals, there was NEVER music to read. He explained it to me even if it took hours. There's 2 things he wanted out of that. He wanted me to know how to think about his tune in a way similar to him, and we wanted to teach me about harmony. That was some of the most invaluable harmony lessons I ever had.
If your goal is to learn tunes and play then you need to analyze understand and think of tunes in a general easy way. Forget all the fancy terms, unless you're going for a ph.d.
That's my approach anyway!
In this section will be all my analysis of tunes.