For drums, you should use specialized drum mics.
For electric guitar, there’s nothing wrong with the SM57 (presuming that’s a typo).
I’ve also seen the Sennheiser e609, e906, and Rode NTR recommended by professionals. Not Dave, though, he told me to use the SM57. I did get the NTR based on the specific advice from a virtual friend/professional on the PRS forum. I haven’t tried it yet, though.
Don’t know about acoustic guitar or piano. Am going to attempt to record piano soon, will bring several mics with me.
I will tell you to experiment with mic position. There are t