I'm learning C++ programming and C++ object oriented...

What would be a good game engine get?

I don't mind if it is freeware or commercial,
But I plan on making 2D games and moving onto 3D..

I would like a game engine which will last me a long time (one which can do 2D, 3D, High end graphics (3D models, textures, physics) I really can't decide what I'm going to use ----->

You can earn a bonus point if you can give me the same information for a friend who is learning Python --- THANK YOU! XX

P.S. The sort of games I wish to make would be open world (large open areas) and a game with a similar graphics as Rome total war 2/shogun total war thanks again :) Also I don't know if this is relevant but I am based in the UK.