ASL is a different sentence structure and sequence than English. The signs are also less intuitive and graphic/obvious to laypersons.
If you want baby to be able to be fluent in ASL when older, that's fine.
If you are looking for a way to effectively communicate before Baby has the oral motor skill for speech, baby sign is just fine.
Also, when teaching, create communication temptations. Blow bubbles. Then show " more". Help Baby do "more" then blow more bubbles. Do the same with milk, blueberries, anything.