How do you get notification.. Like where do i have to go to get notification of new episod...

When you finish the manga, there are three botons, one day reading touch it and then you will get the notification of any manga you do that

Do i need to bookmark it?

Nop, there are three “botons”, 1. Already read 2. Reading 3. I don’t remember this one, touch the one in the middle that says reading in any of the manga you like, and you will get a notification every time they update

Thanks got it!