I have been following Denys Davydov on Telegram. Can't say I know a whole lot more than you. He is a Ukrainian guy who has been doing youtube videos also. He has been putting up Telegram posts constantly since yesterday.
This morning there were reports that advance elements of the Wagner soldiers were 100 km from Moscow. Then there were a bunch of reports that the Belarus leadership was trying to broker a deal to stop it. Yesterday all the initial stuff was they took over the local military headquarters in Rostov near the Ukraine. If they are already close to Moscow, that means they aren't messing around. I guess we will see.