I was meant to write a blog post like this since forever. Anyway, if you want really advanced stuff this[0] is definitely a way to go. As for ```gx``` since I'm using aerc as my email client, a trick I found very useful to open links using only the keyboard is to open an email then rq (reply with quote) search for the link and gx.
0: https://www.ele.uri.edu/faculty/vetter/Other-stuff/vi/009-in...
Edit: add the bit about aerc