The Russians have had men in the field for almost two weeks of hard combat in extremely hostile territory and 100% of the forces committed are in the country. About a third are combat units mostly at the tip of the spear or attempting to secure vast areas with many towns and village bypassed and a lot are being armed where they can with soviet era weapons perfect for irregular troops. This rate of arming the civil and volunteer forces is accelerating and the truck convoys are flowing relatively unimpeded deep into Ukraine distributing arms by the tens of thousands to highly motivated partisans every day.
Fighter jets are important but so are AA systems too, ones that are mobile and can reach very high up and at longer ranges, that can shoot and run to new locations. I'm certain these are being delivered, in lieu of a no fly zone, but they do require some training, but not that much, these things are designed to be as simple as possible to use and maintain. These and stingers will make the air, even over contested cities, very dangerous for Russian planes. I believe these can offer effective protection to Ukraine. Zelenskiy, like Churchill, would like more American involvement and is making demands that will result in more planes and AA systems.
The writing is on the wall with each passing day the Ukrainians are growing stronger and the Russians weaker. The troops there have no reserves, no replacements for combat loses, no relief and being rotated out for R&R. No way to help their supplies if they are being attacked by irregulars on the ground and they have no combat troop screen, no way to get to them on jammed up roads under partisan attack. Being cut off from food an ammunition in a hostile country is very bad for the boys at the front. I will take Vlad awhile to assemble his mighty army and they will be going into Hell in a few weeks. They might evacuate millions of more women and children to clear the battle zone, the young women stay and will do logistical support and countless other vital jobs. most of the Ukrainian army will be well equipped combat units that could number in the hundreds of thousands in a few weeks and most of them will be combat troops, their women at their backs will provide the usual logistical support.
When Vlad's might army arrives, he better not make the same mistakes as the first time around!