I usually search for what I need in the internal search facility (the magnifying glass icon at the top of the page) ;)
The link thing is easy. Use square brackets [] around the title of your link - for example [Wiki]
Then right after (no spaces) you enclose the live link in round brackets (link address)
So it would look like this
- but take you to the page, not the made-up one.
Fantastic it's way easier than I expected! I see code and special characters and panic but there's really no need!
Nope, no need to panic. And if you do what I do, get to know one command at a time before moving onto the next, they'll become second-nature and you'll not have to go looking for them :)