LCD1602 + I2C display advice

Hello Friends - I welcome your advise here ,I want to add an OLED display but I don’t know how to write code, the are the plugins but my project suits a LCD1602 I2C Display Module Blue Green Screen 5V PCF8574 IIC from Ali Express and this type of display isn’t covered by the plugins. Whats the best way to add this or other displays not covered by the plugins? Thanks

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