Just asking... ive got ppl saying, as parents, we'll know what is our child saying or babbling(?) But seriously i have zero idea... do I have a problem with understanding my child? She's 1yr old plus

It takes a lot of trial and error, and spending time with her would help :) Even if you don't know exactly what she's saying, you can roughly estimate from the situation and say "Are you ___ because ____?" - she could then respond via body language or more babbling, sometimes it's the random talking to them that helps build the bond!