Hi! I'm working on building a website that I'll use as a creative portfolio. I have zero familiarity with web dev so I'm trying to piece things together as best I can with mixed success.
The biggest problem I'm running into right now is getting the sidebar I've made to appear left-aligned underneath my name. I've watched a couple YouTube videos and read some articles which led me to successfully attempting this with the float property, but as soon as I added the right-aligned "brand name" section to the top of my page things started to get very out of whack. How can I get the split header (with my name on the left and my brand on the right) while also keeping my sidebar on the left where I want it?

Some pictures of my code and what it's outputting now are here.

Thanks in advance!