How to invest lump sum with low risk?

I’m a single person and can’t afford to buy an apartment, let alone a house. I’ve given up and looking to invest my savings I’ve worked hard for. I have about $150,000 all up.*

I feel nervous about investing all the money but it does seem like a waste letting it sit in my bank account. I come from a really poor family background and gambling issues so I feel uncomfortable with the idea of investing.

Any advice for a beginner like me regarding platform, amount of money to invest, and how much to keep as emergency?

I’m financially illiterate but I’ve been good with savings…

Would appreciate any tips, thanks!

*I am financially supporting my parents as well.