Teach me how to make simple EA's

Hello, I want to learn how to make my own auto trading bots that auto buy and sell percentages or basic lots based on certain indicators.

for example teach em how to create in metatrader 5

Auto buy when MFI indicator reaches 100 on an m30 timeframe and set a t/p at 5 pip and s/l at 5 pip with 1% lots

Willing to pay and be patient. Thanks