Of course they don't want to take over Europe. They want their regions in Ukraine and renegotiations on security on whole of their western border and now just not promises of security based on goodwill, because all goodwill between parties have been destroyed because of this war. If they wanted European resources, goods and tech they would just much rather trade for them. It's much simpler than taking the burden of occupying and administering a fucking unruly European subcontinent! That would btw also get destroyed in the process if they ever tried to take it. Jesus, they don't even want to take over all of Ukraine for pretty much the same reasons.