@Zeeshan1 you’ve already received some great suggestions, and they are all spot on. I wanted to chime in with my perspective too, and add a resource walking through how to set this up that may help.
As already mentioned, you could easily use what’s already built into Webflow.
If you want to take it to the next level and layer in some automation, you could use a free Integromat account to route those form submissions back into the Webflow CMS. Here’s a screencast walking through how to do exactly that:
You could also very easily route this to other destinations, like Airtable, or a Google Sheet (for example).
If you wanted to take it a step further, not only could you collect and save that user info, you could also automatically pop off an email to them doing something like this: