Earn your first 100k by doing missions and robberies.

Get the TucTuc van and pick: tactical bananas, head flashlight (optional).

Then pick a mall that has 3 stars of difficulty. Wait until the guard stands by the window. Then interact with the banana and get the guard's attention and make him slip. Pick him up and get him on the trunk.

Then enjoy your 960000 dollars! It will be smaller due to tax. Repeat for more!