If you want to follow a game, it is usually good to have a scorecard. I found this impeachment guide useful, as it has links to the documents and a running chronology.

I also saw a story (looking for the link) that said the problem the Democrats are having is that Trump keeps expanding the bases for impeachment. His malfeasance is moving faster than investigators can keep up. At some point they have to cut bait and go with the charges they have (I had that problem as a prosecutor with serial offenders). I suggest each relevant committee submit a charge and keep it to under 12 pages, with a one page summary (with bullets) to keep Trump in the loop.

A well reasoned argument is like a diamond: impervious to corruption and crystal clear - and infinitely rarer.

Here, as elsewhere, people are outraged at what feels like a rigged game -- an economy that won't respond, a democracy that won't listen, and a financial sector that holds all the cards. - Robert Reich