We can't give you just plain investment advises.
Do your own research (DYOR).
Start with assessing Top100 Coins. Get an idea how good and projects look like.
Promising Coins for 2018 (not for short term like two weeks) are Ark, VeChain and COSS imho.
Again - I am no advisory and I can't tell you what to do
Yeah, good way to start is to research on your own. A good thing to do is also join a community in Slack or Telegram.
How would one go about finding a good slack or telegram? I'm in a couple discords, but more information is always better imo, would love to hear of a couple.