My friend asked me to do him a big favour...

Hi guys. I'm relatively new to coding and learning as I go. I'm much more familiar with the design side of things. So, I got a call from a good friend of mine saying he was in a just out of a contract and needed some help, so I said I'd do it for free since I'm at the moment I'm not in a contract and he was going to pay for a beer or two, so it made the trip worth it. <br><br><br>The problem is, he told me he needs me to "fix some html on a website" from a guy who was an intern for him. The guy was in uni for his masters in computer science at the time, so I was expecting this to be something weird like "the picture is upside down and I don't know why" or "I don't know how to change the font color". <br><br><br>I get there. He gives me an email with the project, and it's an entire website. He's made some changes, but the guy isn't working there anymore so he needs me to put the changes into the website. <br><br><br>I look at the code. It's all this AEM and SPA stuff I have zero knowledge of, and he still wants me to do it. I told him I was no expert in coding and it will take me a while because I will have to learn it, but he just said it's fine. <br><br><br>I went home. I tried to learn. Got nothing done. I really want to help my mate out, but this is well above my skill set. What do I do?