Is html, css and js enough to create a working website?

Question

Freelance

I have basic knowledge of html, css, js. Only pet projects based on templates.
A friend wants a website (simple, a few pages long and with a calculator for calculation and feedback). A site on a highly specialized topic (tailoring of overalls). Not urgent, because he himself doesn’t understand anything about this, I’ll have to think about design, pages, and seo for him, and upload it to some kind of hosting (he doesn’t even know how much everything is needed).
I don't want to delve into my own topics. I'm wondering if it's possible to do ok only on js. Or is it worth looking for someone for the backend (what is needed there?). And what hosting is suitable if I myself have to edit something on the site?
I really want to try myself in a real business, but I don’t want to “lay a mine” on a friend either. Moreover, he has to pay (I have no idea how much it costs).

Answer 1

if only you can master the feedback from the functionality yourself, there are 15 lines of code and everything has already been chewed, there are a lot of examples on the Internet
, otherwise you will only be messing around with the design, but seo ... then a finger to the sky

Answer 2

I think WordPress is the best fit here. Take some Elementor type constructor. And put a plug-in for feedback. For the calculator, you will also need to look for a plug-in. And so, on HTML CSS JS it will be difficult, and besides, PHP is also needed to process the contact form.