I Want To Make A Game Like Metrix Or GTA 5
Well, you can start by hiring a 150 people team.
Most people do not understand that making a game is team work, you cannot do everything alone.
You can make a small game like Mario alone but a big 3D AAA game needs lots of people and funding.
Just go through some of the credits of any big game, and you will understand the number of people required.
If you still wish to make an indie game, I have put up a description on my site, you can check there and proceed accordingly -
Sure just code it and buy assets on marketplace.
It takes about 3 weeks. Just ignore the haters. Sigma grind mindset. You will be a trillionaire one day.