how to lwc ? Share some basic data basic because i dont have any knowledge, i am a begineer?

Please Go through Below trailhead Modules To learn LWC. most of your questions will be answered in the Thread

https://trailhead.salesforce.com/content/learn/modules/lightning-web-components-basics

https://trailhead.salesforce.com/users/sakthivel/trailmixes/lightning-web-component-lwc