If you look at Krisu's video, you can see the order of the items from his Splits. As far as enter locations, it takes a few runs and eventually you'll be able to do it without thinking.I saw the run you submitted, and your order was good.
You gotta keep doing runs to improve not only mechanics, but also route memory 😃

Look, you can do all the investigation you want, but I'm going to defend Luigi. He has put an incredible amount of time into the game, innovating a lot in different categories and sharing all his thoughts and crazy tactics with the community. All the unbelievable stuff that he has done, is not impossible. Most of them, i have done them myself, some (not many) have done even better than him. I'm pretty sure I'm not the only one that thinks it's a huge pleasure competing with this guy

Just give us a category where we can press A to jump pls.
In all seriousness, I 100% agree with Luigi. I've spent almost 200 hours speedrunning this game and in all of them I had fun. Over the last month, I made extremely huge progress (thank you Simple category) and got times that are close to the top. There was always a carrot on the stick, that kept me moving forward and compete against some extremely good runners.
But i gotta say, I HATE this glitch! Sure, It's easy to execute on IL, but on a complete run, It's extremely obnoxious (don't worry Luigi, if you say you suck, I suck twice as much). It is ruining the fun for me and the fact that I saw a bunch of people in the community saying to just get good, not gonna lie, made me sad.