I'm a developer from a shit hole country I'll be real with you.
First my stemcel, you need to put shit in your GitHub (a lot) . Having a Shiny GitHub is the best CV you can have, I can't overstate how important this is. Recruiters will ask you constantly about it. So start building shit.
Second, check the market, Hadoop, spark ? I suppose Java is fine (but you have to learn Spring), But there is A LOT more of demand for Python, PHP, Node those tech are waaaaaaay more popular. Kotlin, Swift. Also WordPress, Shopify. Knowing those tech will help you a lot.
Second, the page is not that good, you can expect 15 usd per hour , perhaps a little more when you. 20 if you have a lot of experience.
Third, you English , I hope you can speak English.
Now , were you get job. Look for freelance job in Google, you can also check in stack overflow and Quora. But let me tell you in the beginning you need to gather reviews and experience, expect 10 usd per hour jobs