I'd like to suggest Magento 2 Store Pickup as one of the best solution to boost your conversion rate and improve customer experience. With this extension, your customers can search the nearest store in the checkout page and plan to pick up desired items conveniently. The extension provides clients necessary information of stores including name, location, image, working time, etc. Hence, they can save a lot of time for determining the most preferable one.
Magento 2 Store Pickup offers you a ton of fantastic features:
+, Select available stores in the checkout page
+, Show product availability in stores
+, Access any stores quickly with simple contact form
+, Select delivery address in the checkout page by one click
+, Configure retailers’ information with ease
+, Search stores fast by various ways
+, Find store locations with a pin marker on Google Map
+, Add/manage multiple stores with details
+, Set up special opening hours for each store
+, Manage retailers effectively
+, Show store locations with an intuitive user interface
+, Showcase multiple stores in one single map
+, Display store's information in a well-organized layout
+, Integrate with Store Locator extension
+, Fast speed with Magento Block Caching
Check the demo to get real experience: http://newdemo.demo4coder.com/m22/.
Also, you can refer video guides of Magento 2 Store Pickup extension.
1, How to instal:

https://www.youtube.com/watch?v=I_EjMekCE-Q&feature=youtu.be
2, How to create new stores:

https://www.youtube.com/watch?v=WgksrPqpBtA&t=4s
3, How to config store pickup shipping:

https://www.youtube.com/watch?v=OARtINFVg_Q
4, How to config store locator:

https://www.youtube.com/watch?v=hadKZBbwmNc&t=71s
View detail: https://landofcoder.com/magento-2-store-pickup.html/
With this module, you can develop your online store significantly.