Step One: Buy a web domain and set up a site on Wordpress or Medium (its easy enough to get a nice stylish one, if you need a hand in how to do so just ask here)
Step Two: Start writing and publishing on your own site
Step Three: Get feedback, you could post here (do we have a section?) or even tweet wrestling journalists/bloggers you like and ask them politely to read your material and let you know what they think
Step Four: Build up your portfolio of work
Step Five: Learn how to pitch stories
<--That's a link to a good article on pitching
Step Six: Start pitching (a lot) and getting your name out there.
Takes time, effort and luck but it is doable. You're in the UK and I know the Sun used to have a wrestling section at one stage. Do they still? Could you offer them, or titles like them, something they don't have? Do Wrestlezone, or sites like this, have a UK correspondent? Pitch a story around an interesting topic (the UK scene is blowing up right now so is there a hook there?). Do not pitch topics like 'Here's why I think the WWE sucks', takes a while before you can rely on your name value to carry columns like that.
Good luck too! Always good to go after what you really want to do in this worl