How to change woocomerce total?

Question

WordPress

Hello.
In general, the task is this: there is a custom delivery map, here is an example x91336xs.bget.ru/map (Enter the address: Lenina 10), this map is also on the checkout page. It is necessary that the delivery price be added to the total amount in full, that is, recorded in the database. I'm not strong in backEnd, give me an idea how to implement it or where to dig.
Thanks in advance.