This website gives you up to date information on the currencies. Starting from the left to the right:
# = the ranking by Market Capitalization,
NAME = The name of the currency
MARKET CAP = The amount (in USD) that has been bought of the currency
PRICE = Current average price of the currency per unit (Example, 1 Bitcoin costs $3902.58 USD)
CIRCULATING SUPPLY = The amount of currency that is currently in circulation (not necessarily in the market)
VOLUME (24H) = The amount in USD that has been spent selling and buying the currency over the last 24 hours (Example, $2,195,600,000 USD has been spent over the last 24 hours buying and selling Bitcoin)
% CHANGE (24H) = The percent of which the price of the currency has changed measured in USD over the last 24 hours
PRICE GRAPH(7D) = A 7 day view of the price in USD of the currency.
I like and trust Coindesk. This website is a great place to back check information that you may have received from the rumor mill. The offer education on blockchain technology and general news within the crypto community.
Coinbase is a website where you can make an account and buy Bitcoin, Litecoin or Ethereum. Coinbase started in San Francisco, CA and has grown to be one of the most trusted markets within the United States for purchasing some crypto. Large amounts of their supply of coins are stored offline which makes me feel better about possible hacks (even though the safest method is always in your own coin wallet offline). Even if you don't have an account you can always go to the website and just look at the cost changes of the coins.
This website is part of Coinbase. Gdax is their marketplace where you can transfer your coins from your Coinbase wallet to your Gdax wallet free of charge, back and forth as much as you want. GDAX allows you to sell your coins to other members who are buying and selling all the time. In order to avoid fees, always sell and buy coins at your own specified price. NEVER do a market sale or buy, you will be charged a fee. Also, by watching Gdax, you can kind of get a feel for which way to market is going. For example, in this photo, IF THE GREEN IS HIGHER THAN THE RED, there is pressure on people to sell lower, which means the price will likely go down if this trend continues. IF THE RED IS HIGHER THAN THE GREEN, there is pressure on people to buy higher, which means the price will likely go up if this trend continues.
Another good news website for crypto. I like this site because they usually give some pretty good analysis of where the price of certain coins may trend in the future. It's not the words of the crypto gods, but it can serve as a good reference for your decision making.