It really is down to luck you just need a good quality set of Torx drives that go down quite small, there’s only 2 little bolts that hold it in then 1 little wiring plug and that’s it.... if the bolts undo on mine 1 did and 1 didn’t it just rounded off so I cut the head of with a decent set of large side cutters and then I had to carefully break my valve up using a pair of 5 hole grips to crush it then one I had the valve out the way there was about an inch of bolt to get hold of, all in all it took about an hour but did get smothered in power steering fluid in the process but yours may come straight undone and then you will only lose a drop whilst you swap the valve.
My advice if your not sure is have a go at cracking each bolt and if they feel like they’re going to snap or round then take it somewhere and let them worry about it, I would carefully clean inside the head of each bolt with a sewing needle to make sure you get as far in with the torx as you can. Good Luck