Just look at the comments and realize you will not find that kind of advice here. It's like asking Microsoft in the last century how to make money with free software.

Look at what you already know and see how these skills are needed. If not sufficient, learn compatible skills to expand your skillset in a way to serve the market needs.

Defi is where the effort is. If you are a developer, knowing how to build then deploy smart contract on ETH is the 101.