Hello,
.
First point is learning 2 to 3 programming language will be beneficial. It brings many job opportunities. Some of the best programming languages are;

• Python
• java
• C#,C and C++
• ruby
• Kotlin
• Typescript

These languages have uses in more then 1 things, they are useful in web designing, application making and in games. These courses have a great demand in many MNCs. Coming to salary it depends on your company and how good you can manage programming. So, in average it various in between 30k to 70k