I have zero experience and have just been looking on Coinbase at the best and worst performers of the day.
I am thinking of buying coins that are 15% or more down and then selling once they pump 10% and move onto the next one that is 15% down and then again sell at 10% profit and just keep repeating.
Anyone done something similar or will it just lead me to losing my money?
You don't have to follow the shortcut rather you can follow the normal path so you have learn something from trading that will help you in a long way. Do not think you can learn everything in a few weeks and start making money. You will need to learn so many things for you to start making money if at all.
Exactly. As a newbie, you can start trading but don't be in a hurry to make an instant profit or simply buy low and sell high, and we will be profitable. According to what I have experienced in the trading market, I can say that to make a profit from trading, it takes you at least 1 year, 1.5 years to learn and accept losses to have can gain lessons as well as experience. As a beginner in trading, accepting losses is the first thing we should do.