Car under 50 lacs

Guys please help me out. I am planning to buy my first ever car. I really don't know anything about cars and just learnt how to drive (and got license). I'm not sure which car to choose (used or new), manual or automatic etc. I've a budget of up to 50 lacs.

PS: I just don't want to visit mechanic every other day if i buy a used car :)