I have some of my site already created with its HTML CSS JS and stuff is there a way I can import all this into webflow so I can start editing the site here
hi @BeItMeNotYou - Welcome.
No, there is no site import feature.
You can drag assets from your file system into the asset manager. That is easy. You can copy and paste as plain text into Rich Text Elements. You can pull content into the CMS via CSV imports. You also can use templates with CMS items (same per collection) which could save time as long as you can work with slug limitations (no nesting).