Formatting paragraphs.

I’m not very well versed in CSS or HTML but I’m pretty sure this is theme specific. I’m trying to figure out some content formatting adjustments. I am trying to figure out 2 things. I don’t necessarily need both at once but more one or the other.

1- How to create an indentation with new paragraphs. (Like what you would do in a basic word processing program)

2- How to reduce the size between two paragraphs. Or the height of page breaks.

I have figured out that if you hit shift+enter it removes the large space between paragraphs which is good but without indentations it becomes a wall of text. (I’ve tried to manually just add 5 spaces in the beginning of paragraphs but it only seems to stay on the first)

I tried to use the web inspector to locate the p area but failed. Like I said- not very good with css. Any advice would be SO appreciated. I feel like I’m sort of backed up against a wall in terms of being able to start adding content without having the ability to do one or the other of these.