It's a handsome amount, & provide you with lots of opportunities:
First & the foremost thing is not to fall into wrong hands. Mostly oversea returnees are lured into various investment & business partnership scams and hence lose all their money.
Secondly do not throw all your money into one single option, like investing in real estate. Real estate is not booming & mostly static at the moment and will remain same in coming years.
Best is to start your own business in which you have expertise & hence you will not fail. Do it on your own without partnership, probably will not succeed from day one. It will take time but eventually you will succeed.