Customizing Whitespace

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Hi,

I'm super new to this. Long ago I would customize my LiveJournal, DeadJournal, Blurty, P_____, and all of those things. I was a teen then with a riper mind. In May, I successfully customized the free gray theme available on the market, however there were a few 'errors' on the page.

This is all for my personal website/business website.

I am curious as to how to change a couple of things on this Whitespace theme. I want to get my line height relatively small, my words in small caps, my colors different, my font in arial all over, dotted borders around the blocks, underline link hovers, simple things like this (think minimal but fun early Geocities or LJ customizations). However I keep trying to do all this stuff and it works on some blocks but not all, or it works only half-way or so.

I also am curious about customizing the auto-nav block, which seems to be its own thang.

I believe I did use Filezilla to edit some of these things in May, but have since forgotten nearly everything I did.

I really would appreciate some help.

Thank you so much.
Bridget