Need help making blog visually appealing

Hello,

My blog is https://www.spoolish.com, I am using the twenty twelve theme.

I was hoping to get some help on here. I have a lot of questions. I would appreciate it if even one of them could be answered. I have zero background in programming and web design, hence the issues.

If someone is able to answer a few of these questions and is in website design, I’d be happy to share their information with my blog followers. Anyway, here are the questions:

1. How do I create the small image in the tab beside my website title?

2. Am I able to have images in my menus? (Would like to have small graphics that, when clicked, lead to certain posts)

3. When I include an image with a white background, why does it look like it is pasted onto my site…aka why can I see the outline of it?

4. If a theme only includes one menu option, is there a way around this?

5. Does anyone know of a good blog/site that has a lot of tutorials for beginner bloggers/website designers?

Thank you in advance!

Martyna