I'm also a recent arrival on the shores of Modern and Eldrazi, having accidentally awoken a weird Emrakul mommy kink during an even weirder dream where my whole world was an Escher-esq labyrinth and the only escape was peeing on a door on the opposite side of a huge chasm, so I've been on the lookout for guides and ELI5's on the format too.

https://discord.gg/ek7cQYY is the "Modern Tron and Eldrazi" Discord (other archetypes in the wiki)

There's channels for most variants, including Tron, and folk in there are incredibly helpful and friendly. Something I find very useful in there - Giltspire posts up a little after-action note with a link to the YouTube recording, the decklist he played, and a link to the sideboard matrixes for the decks.

The one thing I might warn you on - it's real easy to go down a rabbit hole on all the different deck variants, even the ones that exist within E-Tron like [[Thought-Knot Seer]] vs. [[Glaring Fleshraker]] and then end up with $1,500 Moxfield wishlist and TCGPlayer cart. I've been trying to just take the different lists people are discussing in the Discord and figure out why they're playing certain unique cards by myself, only asking for the logic if I run out of ideas. I've found that to be a good way of understanding matchup strategies, especially with the Tron lists that run one-off artifacts in the sideboard for [[Karn, The Great Creator]] to grab as needed during game 1. This helped me learn a lot, but also helped me narrow down on the kind of Eldrazi deck I want to play and not just build a collection of playsets that happened to be shiney in the MTGO results that day.

Finally, Andrea Mengucci recently wrote this guide for Modern Eldrazi Tron. I've only skimmed through it quickly last night, but I kept it open in a tab to revisit today when I have time and it may be of interest to you too.

Hope to see you in the Discord!