Can I make my form a specific height & width, if so can I fill the area up with content, instead of it being a vertical form?

Yes, you may increase the form's width by opening the designer, going to the styles tab and setting the desired with there: 

You could also customize this with using the form's CSS class: 

.form-all{

 width: 100px;

height: 100px;

}

You may change the properties values as you want, this guide will help you to inject the code to your form: How-to-Inject-Custom-CSS-Codes

I would like to share you a guide that will help you to change the fields position so you display them as you need: Form-Field-Positioning

Hope this helps.