I told you so.
You were right about where Russia's military was going to attack from. We will see if Putin stops with Ukraine or if he continues west.
The information on what's happening is very spotty. Is it possible that Russia "only" did some airstrikes, but they're not going to send in any ground troops outside of the eastern territories? I heard a rumor that Putin gave Zelenskyy an ultimatum to cede eastern Ukraine within 12 hours or else Putin would continue with a full invasion, but I don't know if this comes from a reliable source.
I think this would be unlikely. Before the attacks started, Zelensky tried calling Putin, but he did not answer, and Zelensky had publicly stated that he would be willing to negotiate for peace. I don't see any reason why Putin wouldn't make this demand before starting military action, as starting military action is risky, even for a dictator. Being that there has been an insurgency in eastern Ukraine for years now, I don't think Zelensky would have been strongly opposed to giving eastern Ukraine in exchange for peace.
There are reports of a Russian "hit squad" whose intentions are to kill Zelensky and his family. If these reports are accurate, it would remove credence to Putin offering peace in exchange for Eastern Ukraine. Or at least that any such offer would be credible.
It'd definitely be possible for Ukraine to fight off Russia with a years-long insurgency. The West will be giving them endless supplies, so Russia would have a much harder time than the US had against Afghanistan, for example. But I don't know if the Ukrainians have the will to fight Russia for years, and I don't know that I'd even recommend that they do so, since the costs of this sort of insurgency would be so high.
The Russian economy is approximately 1.5% the size of the US economy. I don't think Russia would be able to finance a years-long insurgency the same way that the US did in Afghanistan. Sanctions against Russia will make it more difficult to continue to finance any war in Ukraine or elsewhere in eastern Eurpoe. Russia's big stick is its large stockpile of nukes. If not for their nukes, a war against Russia would be trivial to win because they lack the manufacturing capacity to continue to produce weapons that are needed for war.
The Ukraine government has asked its citizens to make Molotov cocktails. If citizens make these (and use them against the Russian military) in large enough numbers, the invasion would quickly get expensive for Russia in terms of soldiers and military equipment.
Russia was able to take control of the Chernobyl nuclear power plant that is currently decommissioned. Putin likely wants control over this site because it would potentially provide an easy path to Kiev.
There were anti-war protests in Russia yesterday (Thursday), which is especially noteworthy because Russia does not tolerate dissent.
Biden was reportedly presented with options to launch a cyber-attack against Russia in response to the invasion of Ukraine.
In what may or may not be related, the hacking group "Anonymous" has said they are in the process of attacking Russia via cyber attacks. This raises the question if "Anonymous" is actually an apparatus of the US intelligence agencies and/or US government.