Subscribed, ought to be some good info headed your way OP. Eager to see the suggestions, as this grass looks similar to mine- thatch filled if I'm correct. Simple fix from what I've read, but I've never done a dethatching, so what do I know.
Stay tuned for advice from the seasoned LCO's, they'll get you the info you need. Be warned some of them may come across wrong at first but they know what they're talking about.