What do I have to do to be able to make and reply to threads?

Hi! Unfortunately, until you hit certain trust levels, you aren’t technically able to add links. There is a work-around that the Tech Support has suggested. If you use the </> button (hovering should show “preformatted text”) or if you put your link between two of this symbol: ` (should be the button under the esc key, if you don’t know where it is), it will

show your link like this

Here’s the General Forum Things™:
https://us.forums.blizzard.com/en/overwatch/t/welcome-to-general-discussion-please-read/118/27

EU Version which discusses some formatting and Trust Levels (which eventually allow you to post links and images):

Trust Level Checker (compliments of Dysvalence):

So far as being unable to post in other threads, this might help:

Happy future posting!