Positioning Gap / Space

Hi,

I am currently building a blog for my sister and would require great deal of support from everyone. I am using the theme – Graphy.

[url=https://postimg.org/image/8ythwmisn/][img]https://s15.postimg.org/8ythwmisn/problem.jpg[/img][/url]

I have 3 questions from the picture shown.
1. How do I remove Gap 1? In another words, how to I move my post entry to the left where it will align with the top banner?

2. How do I make Gap 2 closer to the side bar?

3. In general, I just want to make sure that all my images are bigger than it should be now. Though the actual size is about 1000px and so, plus I have set the image size to be larger in the admin site but to no avail. The post entry seems to have its own limitation of 700px width. Tried looking for it in the CSS sheet and clueless on the variables that should be changed.

4. How do I move the leave comment to the bottom of my post? Having leave comment at the bottom of the main title is kinda silly.

Thank you and hopefully anyone could assist me on this.

PS: Merry Christmas and a Happy New Year!

Link to my website = https://www.jasmineblossomgirl.com

Warmest regards,
Alaric