Be careful here: Push too hard and you will get a kid who hates books.
Read to them. Read with them. Initially they will just follow along. They will memorize the book.
Now you can have fun by misreading a word. "That's not what it says" "Oh? What did I say, and what should I say?
Make a game out of it.
When they are ready they will start to read.
You can find a lot of books and materials on teaching your kid to read. But the key is Keep it fun
One of my few childhood memories from that age is sitting in this giant (to me) overstuffed armchair with my dad while he read Winnie the Pooh to me.
I was not an early reader. Mom realized in 3rd grade that I could barely read. Our answer was a weekly trip (Tuesday evening) to the Library where we got a pile of books. Every day after school, I would sit on the white kitchen stool while she made supper and read to her.
When I got stuck, she say, "Spell it out" then "sound it out" If I didn't know what it meant, I'd ask. But she was quick to point out similar words, and root words. In a year I went from grade 3 to grade 8 reading ability.
Added in response to comment:
Spell it out: This was as often as not so she could know what word was giving trouble, all while she was depriving onions of their skins. Then for sound it out, she'd ask me to try to figure out where the syllables broke, and basically keep at it for a while trying to lead me to self discovery.
Root words. Suppose I was reading O'Henry's "Gift of the Magi" But in my school they only talked about the three wise men. Mom would ask me about other words that begin with M a g i. I'd come up with magic and magician, and we'd have a three onion discourse on how magi words tend to be associated with special/unusual knowledge or skills.
Or how biography was the story of someone's life, while biology was the story of life in general, while zoology was the study of animals. I would make the connection between zoology, and 'zoo' where we went to see sealions. And that bio meant life.
geology and geography gave me geo=earth, and later, about age 12 these words would be abstracted to other celestial bodies.
She'd make non-latin connections too, explaining how Wednesday was derived from "Woden's day" from Norse mythology; Thursday came from Thor's day, as was Tuesday and Friday from Tiw and Frigga
I ran across the word 'ken' in a book that had a Scottish setting. It learning that it was similar to 'know' she then asked me what kinfolk would mean. Well, I already knew that folk were people. And figuring that kin and ken were pretty similar, I guessed, "People you know really well" She would then explain the difference, but I'd hit the nail at least obliquely by figuring out that you would know people you were related to better than you would know most strangers.
And I would connect that -ogy was study of. That 'graph' as a part of a word meant some form of writing, or more abstractly, recording. Thus typography was the art of fonts, the forms that letters could take in pring. And photography was literally 'writing with light' And that geography was the the autobiography of the Earth.