I know that I can display every character after a certain position by doing something like Str1+N, but how can I only get the character at N?

Here's how I'd do it:
{Str1+N}->A
Disp ^oA

This is how it works:
The first line stores the number of the character into the first byte of a two byte variable.  Since the upper 8 bits are all zero, a zero is stored with the number as well.  So the two bytes of variable A look like N, 0.
The second line just displays the character.  To do so, you need the address of a, which is what the degrees symbol gives you.

I hope this helps!

Ahh, okay, thanks guys. Does that also mean that if I wanted to store the quote character to a string, I could do something like _E22->{N+Str1}?

You could also do

:[]→Str1
:"AB"
:[22]
:"DE"
:[00]
:Disp Str1

That way the quote character is compiled into the string, so you don't have to waste time and RAM to put it in when the program's running.

Again, thanks guys! I figured it'd be something simple like that. I never really understood the need for pointers, but after the last week or so of testing, I do.