Is it possible to import my Discord's bot info (number of guilds it is in, etc) on my HTML website?

You can make some sort of API using express (or an other webserver module like fastify) and setup routes to retreive data.

Quick example:

const express = require('express');
const { Client } = require('discord.js');
const app = express();
const client = new Client();
// enable cors
const cors = require('cors');
app.use(cors());

client.on('ready', () => {
app.get("/userCount", (req, res) => {
res.send(client.users.cache.size);
});

app.get("/guildCount", (req, res) => {
res.send(client.guilds.cache.size);
});
});

app.listen(3000);
client.login("supersecrettoken");

To get guild count on your webpage:

fetch("http://localhost:3000/guildCount").then(res => {
res.text().then(guildCount => {
console.log(guildCount); // will log the number of guilds
});
});

Hope this helps!