Great question! I'm impressed that you have an interest in particle physics, as it's an awesome field and one of the cutting edges of science. One of the easiest ways to get general information is by starting on Wikipedia, at https://en.wikipedia.org/wiki/Neutrino. Be aware that Wikipedia is an "open contributor" site, so some scientists will object that presentations there are not always complete or fully accurate, but nevertheless its a great way to get a start on many topics. Best wishes in your studies!