Personally, in my opinion, you are taking a really long and complicated route to get to and end result you won't be very happy with. Although, I will admit, I'm still not sure what your end goal is.

If your goal is to figure out what drummers do in relation to a song, you would be WAY further ahead just programming the drums in from the sheet music you are finding. Yes, initially, it will take and awful lot of time PER SONG. However, you would gain a massive understand of how drums really work in relation to a song. That SKILL can be used to both eventually be able to program drums to a song you hear that doesn't have sheet music for but even more importantly, understand how to create drums for you own songs MUCH better. (damn that was a long sentence)

The other option is to simply purchase entire midi songs with the drums included. Picking one here and there would be both cost effective from a money AND time perspective. You can almost instantly see what is happening, and with the ability to hear them! Slow them down in if you want to. As you know, it's not an issue with midi. Depending on your DAW you can overlap more than one midi track to literally see how the drums and bass (as an example) are working together.

To further the point of just buying the midi track, the drums will sound infinitely better than trying to do the whole "read sheet music from a PDF." Those companies typically have velocities programmed into the drums as well. Some even the groove. With drumming, those to things have so much to do with each other. If you can manage to pull the drum transcription, they would likely be all the same velocity. Going in to fix those could be a nightmare...and now your back to programming anyway.

I could go on and on, but just wanted to give you a few things to consider. Knock yourself out with whatever you want to. It sounds like you're going to learn something either way.

"I was only saying to the queen the other day how I hate name dropping."
-Douglas Fairbanks
I have always found that quote funny.

BTW, this post was done with speech to text. I'm am sure there are many errors than I'm not willing to proof. Let me know if anything makes zero sense. Good luck with your project(s)

Chad (Hope that makes it easier)

TEMPO TANTRUM: What a lead singer has when they can't stay in time.