Automatic settings should get rid of the blur, but at this point we don't know what's causing it. As Pete indicated, likely a low shutter speed issue, which can be resolved by by increasing the ISO; automatic ISO would help. Your best bet will be to read the manual thoroughly. There's a LOT of information there, and it should tell you what you need to know to get started.
So, apprently, my post saying that Sigma is a garbage brand KNOWN for crappy focus issues is "negative and snarky".
"Lets try to avoid being negative/snarky toward newbies and instead focus our energy on helping them."
There is a GREAT chance that OP isn't doing anything wrong.