"Hadn't had occasion to read all 5,000 pages of the new bill,"

You don't have to; you'll get to each section as you need to know it. But this has been all over the TV news and the internet. And you really need to know about some of these provisions right now; not later, when you finally have time to read.

I like to read "consumer-grade" articles, because they give great impact summaries without the geek-speak. Such as:

https://www.investopedia.com/american-rescue-plan-definition-5095694

https://www.investopedia.com/everything-to-know-about-individual-2020-taxes-4775907