3.9k for a start is considered quite good.

To be honest, it is not how high your salary is that matters but, it is how you manage your money and make more of it.

Spend half of it, less even better. Don't upgrade your lifestyle according to your salary. Don't rely on your salary to survive next month (no saving, no emergency money, just spend all your money and wait for the next salary).

Depression starts from jealousy/envy. Please don't layan that feeling.