Unless You've a minimum 50% WR as ADC

Do not ADC! Please do not. Every feeding ADC ever costs more games than any other role in the game. ADC is among the most critical positions to play because your lane counts for 40% of the team and you are a significant source of damage for objective control and kill secures. The support can only do so much to help you, but you, as the ADC, have to put in the work to ensure things die.

If you cannot succeed in half your games as the ADC then either avoid ADC or practice it in normal games.

I cannot stress enough how important that role is. Bottom lane is where games are either won or lost.