Ukraine is one of the most corrupt, inept countries on the planet. The Russians already have their port on the Black Sea, they are not stupid enough to want to inherit another mess. Unlike the Americans they seemed to have learned their lesson in Afghanistan.
On the corruption scale I'll see your Ukraine and raise you one Russia. Which is of course is all really beside the point.
Basically the Kremlin wants what it says: an end to NATO eastward expansion, a rollback of previous expansion(s), a removal of American nuclear weapons from Europe, and a Russian sphere of influence. The Kremlin’s primary goal is a guarantee that Belarus, Ukraine, and Georgia will never belong to a military or economic bloc other than ones Moscow controls and that Russia will be the ultimate arbitrator of the foreign and security policy of all three states.
In essence, this 'conflict' is about whether 30 years after the demise of the Soviet Union, its former ethnic republics can live as independent, sovereign states or if they still must acknowledge Moscow as their de facto sovereign.
Ostensibly, the demand for an exclusive sphere of influence in Eastern Europe and the south Caucasus is to meet Russian security interests. The Kremlin has portrayed NATO expansion particularly to the east as the original sin of post-Soviet international relations with the West that now must be rectified. Facts, alternate interpretations, and the security concerns of equally sovereign nations notwithstanding, Moscow claims that without such guarantees, it will use military force to protect its security interests.
Putin moreover and on more than one occasion has complemented this current buildup on the Russian side with blunt language that Ukraine is historically part of Russia and that Kiev needs to return to the Russian fold. If fully committed, the Russian military is multiple of magnitudes and degrees stronger and more capable than Ukraine’s armed services, and the US and other NATO countries have made it clear they will not deploy their forces to Ukraine to repel a Russian ground invasion.
That all said politically above all it is important for this country to do and more critically to be SEEN by our allies as doing whatever we can to support NATO and its broader geo-political polices and aims particularly with regard to Moscow. In this case stand shoulder to shoulder with Washington, London et al in support of Ukraine.
With his limp-wristed approach to Defence matters generally, and his historically 'look the other way' philosophy on China and the CCP, Sock Boy has already sufficiently damaged our reputation in the eyes of the chief Western Allies, so he really has no choice at this point and I'm sure his senior PMO, Foreign Affairs and MoD/intelligence bureaucrats and mandarins must be turning blue in their collective faces while beating this reality into his thick cranium during the daily briefings.