You said you're going to buy and sell, using blockchain.info or any online wallet is not recommended for you, even alternative clients like electrum isn't.
Buying at low and selling at high requires a trading platform, without it, you will have to pay fees and wait for confirmation just to do so.
As a newbie you need to use the simplest platform available,
that is Coinbase for USA (and some parts of the world) or Coins for Asian Countries.
I hear a lot of stuff about coinbase, heres my question they do work right?
Ok so say i buy a phsycal wallet how do i put in/ take out my bc?
It works like a wallet and a small trading platform but the price is overrated than other markets. Trading Bitcoin to USD doesn't require a fee or confirmations.
Coinbase is a big company and been there for a while, only a few issues happened this past few years.
If you want to pull out your funds from coinbase to your physical wallet (Hardware or Paper) it's as easy as withrawing funds from a bank.
Use Send Button from coinbase bitcoin wallet and Copy-Paste your Physical wallet's bitcoin Address as the receiver.
Take note that by doing this, you will have to pay a fee depending on the time you are willing to wait.