Hello, mukhles.
First, download the apk file of the google play application store directly on the web page. The download URL is here: https://drive.google.com/file/d/1TDhe-Wu4tYkw7k6-kMHur-eX3dC4kZgg/view Note that you need to download it on a computer.
Then connect your Huawei phone to the computer, create a new folder in the phone storage, and store the downloaded apk file in this folder. Note that you must remember the name of the folder to facilitate the next search.
The third step is to open the "File Management" of the phone, find the folder you just created in the internal storage, and click the apk file to install it.