So I' working on a personal blog/site, but I'm a terrible designer. Any suggestions and/or opinions would be greatly appreciated!

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I find that minimalistic look quite appealing!

I think I see 5 fonts being used here?
Try and limit yourself to 3 at the most, fonts can get very distracting when a lot are used.

Otherwise for a simple minimal page it looks alright, probably give yourself some more space between the title, nav and content though.

Add a dark theme and you're sorted!

If you have to shorten the text, add some kind of 'call-to-action' to the end.

Also add some kind of visible spacer between each post. Some kind of horizontal lines or something.

@C0D4 I'd like to disagree. The main content is only 3 fonts, the other 2 are the logo. Could you imagine if every company had to use their logo font for their whole site? That'd be dreadful

A line like you put before the bottom line after each post for increasing the readability

I dislike the headers capitalization, Wget, Curl, Best, makes it look like cheap marketing.

Put a 1px border below the nav links, or a CSS box shadow, just to separate the header from the content.

@C0D4 Thanks for the suggestions! There are only three fonts, but I'm using different weights. Would you advise against that?