This is less of a Python question and more of an HTML question. You’ll still need to write most of the page in HTML and then only ‘deliver’ the page to the user using Python, with Bottlepy, as you’ve mentioned .
You’ll need to learn about HTML Forms and Inputs to get anything done effectively. You’ll also want to style the page with some CSS, which you can learn about from a variety of sources.
It sounds like you might also really benefit from some time spent on Codecademy, going through their tutorials on web development
Good luck!
solved Using Bottle, need to create web-page [closed]