Adjusting left and right margin of a page

Hi…you should create a child theme firstly. Read this if you don’t know how Child Themes.

Then in your child themes’s css file, to change the header font size and colour:

.site-title {
font-size: 100px;
color: red;
}

Use whatever font size and colour you like, obviously.

For the body margin changes amend your css like this:

body {
margin:10px 5px 15px 20px !important;
}

Use whatever margins you like, obviously.

Hope this helps. ??