Yes there are lots of people working on Nuclear Fusion. I even know a few of them. Unfortunately progress has been slow. We re not likely to see any significant progress any time soon.
Very sad to read useless answers and with so many recommendations from people who know nothing about the subject and pretend to know by doing mediocre research on the internet.
Yes, if something really was known about nuclear fusion energy, I would know that in 2021 ITER will be operational. And that the scientific advances for this are absolutely GIANT !!!