CMS Templates / Can't link content

Hi all, I’m pretty new to webflow and am a bit confused. I’m utilizing a template for a portfolio that I am putting together. The portfolio is showcasing related work, but the sections all differ in terms of the headings, texts, and images. First issue, I see that the only way to change the templates is through the CMS panel within presentation. Unfortunately, I don’t see how this panel links to the actual page. There is no where to link to the presentation panel.

The second issue, within the presentation page there is no way to style the text. I am unable to center the text, etc. When trying to change this within the actual page it is impossible.

Any help is much appreciated!