In this bear market, does 100$ on Ethereum or Bitcoin make any difference?
If markets are bearish you certainly don't want to be catching a falling knife, you are better off not getting involved, not until markets start to signal intentions of changing market direction! Which is why I think knowing how to read charts is a skill we all need to have.
As a newbie who have only 100$ to risk is this even enough? Can this get me anywhere?
It's all about quantity and if your target coins are eth or BTC you won't really see any gains but you are free to invest in them, best approach would be a 100 every month which should give you a good stash after a couple of years.