As a speech language pathologist, the general rule of thumb is one word is expected at 1 year of age. Some children have many words while some such as dual language learners may be weeks or months later.
Your child is not delayed in speaking words.
Speech development begins with a child cooing and babbling and moves on to jargon. These milestones are the prerequisites for words that follow. These stages are rich in learning how to produce a variety of sounds.
The cooing stage is focused on learning how to produce sound at will. The first coos or squeals occur accidentally until purposeful control is gained. Vowels are generally the sounds that heard at this stage and are made with subtle changes in the movement of the tongue and opening of mouth.
Babbling introduces consonant-like sounds. These sounds also first occur by accident as the child closes their lips on mouthing toys or lifts their tongues to suck repeatedly. (By the way, "mama" is produced by mastering the lips closing with sound and "dada" from the tongue lifting.)
As a parent, you can support your child's development at each stage by echoing your child's sounds to them. This is sometimes called "baby talk" or "motherese" and research indicates that this behavior by parents supports a child's speech development. The key is to model your child sounds and then expand them just a little to be only a small step ahead of them.
By imitating a child's sounds, you encourage them to repeat the sound again. This is the first step of learning to imitate. After they learn this game, you can then make simple changes and encourage them to copy you. Continue the process until they will try to imitate more difficult sounds and words.
Explore sounds by making the "Indian sound" while tapping the mouth or bouncing or tapping the lips with a toy while vocalizing (or even while crying). You can encourage the /b/ and /m/ sounds by lifting the chin to close the mouth while vocalizing (or even when crying).
Making various sounds in mirror play helps children see what their mouth is doing.
The most important key is have fun. Enjoy this delightful stage of development. You have several months for your little one to continue to refine the development of sounds before single words are expected.
If no consonants are heard in the next few months, an evaluation by a speech language pathologist will give you more specific information regarding your child's development.