Tarantula Problem

Hi, I recently finished building my Tevo Tarantula a couple of days ago (this is my first 3d Printer), After struggling with the bed leveling I loaded the SD card with a benchy to test the printer and every print turns out to be a disaster, the first layer sticks to the bed but then every single layer is far apart from the bottom layer.

I haven't print even the first successful model :(

Probably is an easy fix but I actually don't know how to fix this and searching the web I couldn't find an obvious solution, so here I am asking for your kind knowledge. 😊

Pic of the benchy's: [imgur.com/a/7T7kKqu](https://imgur.com/a/7T7kKqu)