Now is a great time to buy if you're eager. A massive correction is happening right now so coins are cheap.
I'd probably limit my purchases to Bitcoin, Ethereum and/or Litecoin if you're new in this game though.
Jump on the exchange Binance or Bitfinex to have a look at what's going on.
I allready signed up in binance a week ago and puted 200$ in TRX... and now TRX is so low... What should I do? Exchange or wait?
Wait it out. Things will recover pretty quickly.
TY <3