Each indicator has its own function and all of these functions have the same goal, namely to gain profits and minimize losses.
I like to use simple indicators and many people use them like RSI,
You have mentioned some of the popular indicators,

First of all enter into trading only when you already have a source of income

This is good advice, but some people start their business from here and with their perseverance they can earn from trading

Good luck for the contest
👍👍😇