It seems to have been Russia's notion of the way things would go in the early days was Kyiv falling and the main fighting would have been surrounding and sieging individual hold out army groups and cities, expecting some resistance.
The really really bizarre thing about the whole "plan" if you could even call it that. Is that Russia didn't even devise a new tactical plan for there invasion of Ukraine, they just copy and pasted one of the USSR's plans for the invasion of West Germany and hoped that would work, despite not even having 1/8th of the Soviet military might the plan was based around, and the fact they were employing it against Ukraine, who were the #2 player in the USSR (Size wise, per head they were #1 based on achievements and influence) and were fully aware of Soviet doctrine.
For anyone unsure what I mean by that, there's an excellent video demonstrating it here:
To confirm, yes that is a highlight clip of the action from a 1980s Japanese anime, and no I haven't gone insane. It's from an animated movie they made about WW3 (specifically the Soviet invasion of West Germany) which due to being based on both Soviet and Western doctrine/tactics is extremely accurate, and because Russia attempted to employ these tactics against Ukraine 30 years later (despite not having the equipment and being up against the co-author of the tactics) you can see most of the big points of the early war play out in a matter of seconds (albeit in not entirely the correct order).
You have the Spetsnaz storming and taking the Ukrainian airports at ~45s to form an LZ as equipment starts flooding across the border. You have the transport carrying their backup/reinforcements coming in at 1:37, which in reality was shot down en route as things started to go bad for Russia immediately. You have the scene at 2:10 where the Tu-22Ms start spamming cruise missiles at infrastructure (comically the creators expected the Tu-95s to be long scrapped by WW3 lol). You have the scene at 1:25 where the NATO supplies/aid starts flowing in. You have the defending air force scrambling and popping off at 1:12. You have the ATGMs popping off at 0:58.
What you don't have of course is the amount of assets involved as Russia didn't have enough to properly enact the plan. You don't have the ZSUs popping off at 1:00 (anti-air guns, which would have been perfect for nullifying drones however both sides retired them years ago, Ukraine due to cost, Russia because you don't need to defend your troops/vehicles from helicopters/ground attack aircraft if you always have air supremacy, lol). And of course most importantly you don't have a NATO response causing escalation to reach Armageddon.
For anyone interested in tracking it down the movie is called Future War 198X, it's long forgotten these days as it has no giant robots or super ninjas but it's still awesome.