The Washington Post has given "key highlights" from the opening statements.
(paraphrased)
DA Matthew Colangelo says that trump paid Daniels on the eve of the election, to keep news of the affair away from voters. The payment should have been counted as a campaign expense because it benefitted trump's run for office. The DA says that it was election fraud.
Attorney Todd Blanche said that trump had a complete lack of knowledge or intent.
That's it for the highlights.
The article also says that they have sectioned off a piece of hallway for trump to do his daily talk to reporters. Microphones and cameras are set up there, and just a small pool of reporters rotate in that space, due to security concerns.