What different types of project can I make ?

Answer 1

With html5(but you'll need JS and CSS also) to be able to build a website static one and also Web games etc.

With Java so many applications one of the most popular being Android App!

Python we all know it's dominating AI and machine learning.

(Web could have given you more concise answers) :)

Answer 2

What games can I make ?

Answer 3

Using JS html css those old traditions game like ping ping, flappy birds, super Mario and etc.

sudoku, carrom board, racing games and the list goes on.

almost anything with 2D, but for 3D you need extra thing like WebGL(please search in the web)