As everyone else has already said, a web browser is a huge project. You've got to worry about tcp/ip&sockets, rendering html, using css, creating a DOM model, executing javascript, dealing with malformed markup and code, and handling all types of files before you can even think about all the things people expect from a browser (ie bookmarks, history, private browsing, security, etc.) It's a huge project.
That being said, it can be done. My suggestion would be to go look at the source of Firefox. I know that you said you want to build a browser from scratch, but it would be very helpful to learn from an open-source project, first.
I would download the Firefox source, and slowly strip it down. In other words, I would take the source and remove all bookmarking functionality. Then, I'd remove the ability to handle addons. Then, I'd delete all code regarding saving files. I would continue this process until I got a very basic web browser. I'd look over that code.
Then, I'd start building my own. I'd take the knowledge I'd gained from taking apart Firefox, and I'd put it into building a new browser.
A whole lot of luck to you!
