Very good free training database chess software
http://scid.sourceforge.net/ you can also get pgn files from
http://theweekinchess.com/twic and also
To start your own personal databases. I bought chess king and got Houdini 5 pro and a lot of games I exported from chess kings database for cheap. Just one word of caution the engine works in scid but if you upgrade to chessbase they won’t let you use engine from any place that’s not part of their software so when I upgraded to chessbase I had to keep scid to use my Houdini 5Pro.