Trying to find a Wordpress theme

I had one Wordpress site in the past, back when I was running Girls Are Geeks (check it out for a throwback!), and we didn’t really focus too much on theme or designs, and since my personal site, A OhKait, is hosted on Weebly, I’m about as much of a beginner when it comes to Wordpress themes as is possible.

I have a couple ideas in my mind when it comes to the design of this blog, and these are the main factors I’ll be looking for in whatever theme I end up choosing:

1. The ability to customize my theme to use my own branding colors and fonts
   
2. A simple landing page with a large full-screen header image
   
3. Use the featured image of a blog post as the full screen header on the post page
   
4. A tiled blog main page, with just simple post titles
   

Is it possible to get all of these things in a free theme? I guess I’ll find out! If you have any free theme suggestions, be sure to send them my way!