Regarding the canon timeline for the MCU Disney+ shows released so far, WandaVision takes place 6 weeks after Endgame, as stated in the series, with a few flashbacks between Endgame and the main part of the story. The Falcon And The Winter Soldier takes place roughly six months after Endgame, IIRC, so it occurs sometime in early 2024 (I believe Endgame was in October of 2023), so it occurs between WandaVision and Spider-Man: Far From Home. And speaking of FFH, it takes place sometime during the summer of 2024, just at the end of Peter's school year, and up to now, is the further ahead we've seen in the MCU.
And because of the time-hopping nature of Loki, it's place doesn't really matter, as long as you watch it after Endgame (for obvious reasons), but it could probably be viewed at any point between Endgame and Spider-Man: No Way Home (if it does indeed deal with multiverse timelines in a way that is similar to Loki).
And as a reminder, Black Widow will be taking place between Civil War and Infinity War, bridging the gap in those two years. The film is also expected to feature a return of Thunderbolt Ross, so between that and Abomination in Shang-Chi, we're getting at least TWO callbacks to The Incredible Hulk this year!
Also, Slingshot was a web series that is a part of the official canon. It’s a brief detour of an adventure by “Yo-Yo” Rodriguez that sets up one of the seasons of agents of shield. It’s short, but sweet. It never got a physical release but you can see it on YouTube. I would REALLY like to have some form of physical release of that series. Maybe I can find a bootleg comicon or some thing.
I just recently picked up all seven seasons of agents of shield on DVD and I was a bit disappointed that Slingshot wasn’t included as an extra on any of them. It would’ve been pretty easy to do. But then again, after they arrived, I began to realize that they were bootlegs.
Well, as of this year, Marvel Studios still hasn't technically confirmed that Agents Of SHIELD is actual MCU canon. It could be an alternate/spin-off universe, though given what has been said in Loki, I'm not sure if that's even possible. Nothing in AOS has ever been referenced in an MCU film or TV series, and in fact, the only pre-Disney+ show to EVER get a reference in an MCU film has been Agent Carter with Howard Stark's butler, Jarvis, making a cameo in the 1970 timeline that Tony and Steve visited. Other than that, nothing that ABC, Hulu, or Netflix has produced and released is technically canon, so if you're just going to watch Canon MCU things, all you have to worry about are the currently released 23 films, the 5 Marvel One-Shots, and the currently released 3 Disney+ shows. There are also smaller bits and pieces like the WHIH News segments that led up to the release of Ant-Man (featuring Scott Lang), and maaaaaybe the Team Thor shorts, though their canonicity could be debated.
As for my MCU rewatch so far, I've gotten through most of Phase 1, and today I plan on watching Captain America: The First Avenger! Fun fact, there's a bit of the score in this film that Silvestri brings back in Endgame as the start of the "Portals" Scene. The scene in TFA is where Steve is in Italy and it's raining, there's a quiet version of the horn theme and swell that (ten years) later shows up as the start of "Portals". Brilliant moment, reflecting on Steve feeling alone at both times, but in TFA, he decides to be the rescuer, and in Endgame, is the one who is rescued. Silvestri is just a genius.
Here's the Italy score from TFA:
https://youtu.be/GWKgx76t7KoAnd here is "Portals" from Endgame:
https://youtu.be/F_mhWxOjxp4-Marc.