I've been watching some of the older "legacy" Marvel animation on Disney + lately. Most of it isn't that good, but has still been interesting to watch old cartoons from the 70s/80s. One of the newer ones has actually been beneficial to my watching Loki, though.
Growing up and in college, I read far more DC and indie comics than Marvel, so I was never tuned in to who was who in that universe. So watching Avengers: Earth's Greatest Hero's has been good at introducing lots of other characters that haven't shown up on screen.
Long story short, two of the episodes have done a nice intro on some of the folks in Loki.
In Episode 4 (Thor The Mighty), we get introduced to Enchantress. In the live action show, she's the variant that the TVA is hunting down, under the supposition that it is another Loki. (The green eyed lady with the magic touch that Loki runs after at the end.)
In Episode 6 (Meet Captain America), we get introduced to both Kang the Conqueror (one of the unseen Timekeepers) and Ravonna Renslayer, Kang's girlfriend. (She's the TVA judge.)
I'm still on the fence about Loki overall. It's enjoyable, but can get both bogged down AND confusing with the alternate timeline business. It's never my favorite storyline.
Q "Why do you like Duke, you didn't even go there." A "Because my art school didn't have a basketball team."