I will pick off some of the low hanging fruit here and would certainly encourage you to google and do some basic research on terminology as it comes along.
If you compile things into a little personal dictionary, especially when you find useful resources (beyond Wikipedia), you can carry that along with you as you progress in your career. Devoting time to your research is essential in quant finance, in my opinion, and the more curious and active seeker of good information and references you can become, the better.
To tackle the acronyms you have listed in the energy space:
PPA - Power Purchase Agreement
VPP - Virtual Power Plant
LNG - Liquified Natural Gas
You will also want to study volatility and history of markets, i think, just to have a general sense of what has gone on and what things are like now.
Here is a good place to study the varieties of commodities (energy) in the market: Bloomberg - Commodities
See also Commodity Futures Trading Commission (US)
- you can find the equivalent organizations s elsewhere in the world by simple searches.
On the literature, I would not get too hung up on technical analysis on its own (though others may disagree and could point your towards quality resources). But on the quant side, you could look at some of the papers publicly available on SSRN, industry publications, and select journals if you have access. If you are at a university now, especially a business school, you may have pretty good access that way. Look for articles and papers by practitioners or by academics who consult and partner with industry peers.
I will provide a few examples and perhaps a book or two shortly.
The spectacle is not a collection of images, but a social relation among people, mediated by images. - Guy Debord