18 month old not talking

Shailo🇵🇷 • Mommy of a beautiful baby girl. Doula/CPT
My daughter is about to turn 18 months old and only says two words. I'm very concerned because she only says Dada and Agua which is water in Spanish. She does babble and scream and pretends to talk on her phone but when I try to teach her new words she just laughs and keeps playing! I'm a first time mom and very nervous. Help please