Hello fellas!

I have recently joined this community and this is my first topic.

Background:
I am an undergraduate Computer Science student. I've been programming with Unity for more than 2 years and have an advanced knowledge of it. I've made several games and now I am trying to make an Arcade Shooter-type game for Android, in preparation for my BSc thesis. Additionally, I want to make a similar one using another engine/technology in order to compare it with the other one (again, for my BSc thesis).

Problem:
And my problem is.. what type of technology is best to learn first? OpenGL (mainly LWJGL) or OpenGL ES targeting for Android devices?
-First, I was thinking of going full OpenGL ES & Android with the expectation to learn the Android environment for future cases. But after that, I was curious weather it will be best to make the second game using OpenGL/LWJGL.

---> All of these add up to weather OpenGL ES on Android is a good starter to learn OpenGL and get enough knowledge about how game engines work for my future career as a game programmer while working at the same time on my BSc thesis or not.(???)

*I am aware that OpenGL ES has some less features but is it still worth trying and will it help me learn OpenGL in the future?
Thank you!