The only two armies skilled at modern drone warfare are Russia and Ukraine. An army without drone experience could get ripped to shreds facing either one.

Contrary to typical narratives my understanding is that the Russians are somewhat ahead on drones. They pioneered fibre optic drones and have more ability to mass produce them with Chinese support.

Ukraine has fought incredibly well and my hope is at some point Russia can't sustain its offensives due to domestic issues. Russia is very definitely straining.

But they shouldn't be underrated. In Ukraine they face a battled tested, fortified frontline and a society mobilized for war. Russia in turn has set itself for ongoing war. Europe is still in peacetime mode.