A
Well, you can try. You can find all the information you need on the internet. You do not even need to pay for an advanced tool. But there are 2 things that you will need. The first one is knowledge. To do a proper audit, you need to have advanced SEO knowledge. And the second requirement is time. It can take a lot of time to perform a full audit by yourself without any help. And if you lack knowledge, then it will take even more if you want to learn it.