Hey mate, Ill send you in the right direction. I am sure you have heard crypto has taken a plummet the past few days, which may mean its either a great time to invest, or a great time to back the hell out of it before it dies out. I will recommend you buy VIA Coinbase, a reputable website where you can buy and sell coins of all kinds, (BTC, LTC, ETH) If you are looking to build a portfolio that is a great place to start, and if you want to manage your coins and spread what you are investing in I would also recommend Bittrex, a trading exchange with all the altcoins you can think of, with live graphs of prices and great tools to help your decision making.