For me, a newbie should start trading by studying, observing and looking for every possible outcomes. By doing so, a newbie will be able to learn first the cycle on how it will work and also, will learn on what to do.
Start with the theory then learn by practicing it with the actual amount.
As a newbie, you do not need to be aggressive, you have all the time to develop yourself so you have to start with a small amount of money
and when you learn enough that you consider yourself good already, that is the time to start risking a big amount.