Hi,
Yes, you can use only the webshop functionality in Odoo by linking directly to the /shop page from your existing website.
Install only the necessary modules: website and website_sale (eCommerce), and avoid installing other website-related features like blogs or events.
Set the /shop page as the homepage by going to Website > Pages and clicking “Set as Homepage” on the Shop page.
Alternatively, you can create a redirect from the root URL / to /shop using a custom controller or a web server redirect.
Unpublish or delete default pages like the homepage, about us, or contact us from Website > Pages to keep only the Shop visible.
Clean up the website navigation menu by removing all menu items except the Shop from Website > Configuration > Menus.
Use a minimal eCommerce theme from the Odoo App Store to keep the interface focused only on shopping.
Link directly to your-odoo-domain.com/shop from your current site, providing users with a direct, clean shop experience without exposing the rest of the Odoo website.
Hope it helps