Resources

DnD Beyond has a decent gallery for most of the important choices, which is less painful than scrolling through the PDF:

If you are wondering how we're going to play a tabletop game on the internets, the answer is Roll20. There is allegedly a thing I can set up to let you export your DnD Beyond character sheet and load it into roll20, which would be cool.

Sourcebooks

The Trove has copies of all the sourcebook PDFs. If you enjoy the game, I would encourage you to purchase the books yourself (but you do you).

Here's a handy guide for the most relevant books:

Sourcebook Acronym Trove DnD Beyond
Player's Handbook PhB Trove Purchase
Acquisitions, Incorporated AI Not yet available Purchase
Wayfinder's Guide to Eberron WGtE Trove Purchase
Xanathar's Guide to Everything XGtE Trove Purchase
Artificer Class - - Read

Other Stuff

Here are some other resources that you may enjoy.

Beyond these, I think Acquisitions, Inc is a podcast (or youtube series?) by the PennyArcade people. You could check that out. There are a bunch of Eberron novels too.