You really don't need to lube a synthetic-sealed spring piston airgun's chamber very often- every couple of thousand rounds a tiny drop of lube will do. The PFTE piston seal is self lubricating, for the most part.
I'm still using the Beeman kit with the three types of lube, silicone cloth, oiling needles, etc that I bought in 1983, if that tells you anything. Worry more about the pivot points, barrel detent, etc.
And yes, airguns are a great training aid. If you can lean to deal with the weird springer recoil you can shoot anything. I need to dust mine off now that I think about it.