So, before you get into Crypto you're going to want to know that it's like the wild wild west of investing. The vast majority of the market is driven by speculation and promises of software delivery, as opposed to actual product, so you should anticipate violent fluctuations in your portfolio on a daily basis.
Here are your initial steps:
1. Create an account on Coinbase.com
2. Create an account on Bittrex.com
3. Download the smartphone app "Blockfolio"
Once you have these things done, look online for a bitcoin wallet. A wallet is software that stores your cryptocurrency values, i.e. where all your investments are going to be stored. For bitcoin, I prefer using electrum- it's simple and intuitive. So download electrum; installation should be pretty straightforward. Save your password (and your other wallet passwords) on physical pieces of paper OR you can use a software called Keepass, which is pretty useful when you have multiple wallets with long passwords.
Once you have your BTC wallet set up, you're going to want to go to Coinbase and buy Bitcoin with a credit/debit card. You'll have to establish your card as a method of payment first, pretty straightforward. Once you have BTC in your account (your bank might throw a fit first, because to them using your funds to a cryptocurrency trading site is sketchy), send the BTC you have to your electrum wallet. The address you send to is the long string of characters you see in Electrum under "Receive" tab. Make ABSOLUTELY SURE that the address is correct, or else that BTC is gone. Once the BTC is deposited into your electrum wallet, go to your bittrex account -> wallets -> click on the + sign for Bitcoin, copy the address for that wallet (another long random collection of characters), go to Electrum -> send to that address you see on Bittrex