How to get into React Native?

import React, { useState } from 'react';import { View, Text, Button } from 'react-native';const Calculator = () => {    const [input, setInput] = useState('');    const [result, setResult] = useState('');    const handleButtonPress = (val) => {        setInput(input + val);    }    const handleClearPress = () => {        setInput('');        setResult('');    }    const handleEqualPress = () => {        setResult(eval(input));    }    return (        <View>            <Text>{input}</Text>            <Text>{result}</Text>            <View>                <Button title="1" onPress={() => handleButtonPress(1)} />                <Button title="2" onPress={() => handleButtonPress(2)} />                <Button title="3" onPress={() => handleButtonPress(3)} />                <Button title="+" onPress={() => handleButtonPress('+')} />            </View>            <View>                <Button title="4" onPress={() => handleButtonPress(4)} />                <Button title="5" onPress={() => handleButtonPress(5)} />                <Button title="6" onPress={() => handleButtonPress(6)} />                <Button title="-" onPress={() => handleButtonPress('-')} />            </View>            <View>                <Button title="7" onPress={() => handleButtonPress(7)} />                <Button title="8" onPress={() => handleButtonPress(8)} />                <Button title="9" onPress={() => handleButtonPress(9)} />                <Button title="*" onPress={() => handleButtonPress('*')} />            </View>            <View>                <Button title="." onPress={() => handleButtonPress('.')} />                <Button title="0" onPress={() => handleButtonPress(0)} />                <Button title="C" onPress={handleClearPress} />                <Button title="/" onPress={() => handleButtonPress('/')} />            </View>            <View>                <Button title="=" onPress={handleEqualPress} />            </View>        </View>    );}export default Calculator;