I was learning 'Knocking on heavens door' , cover of a Dylan then Hendrix song by Cold Chisel when a mate knocked on the door and said his bands drummer was out, and in desperation could I do a gig. Bluffing I got through it, and very quickly learnt from being thrown in the deep end to 'wing it" albeit with one beat under my hat as best as I could and learning some new songs very quickly at a gig.
The band folded soon after, but the exposure got me further work and started my lifetime of drumming and learning, I guess just find songs that you like, are easy time keepers, and progress from there.