In this video you can find one way How to install Google Play Store on your android phone if you does not have it. Just follow this steps :
Step 1. Open any browser you use, and go to Google and search Aptoide Install
Step 2. Go to this link bellow m.aptoide.com/installer , click install Aptoide , Open this app and make a search with name PlayStore.
Step 3. After you make a search of this , click on PlayStore Icon ,
Step 4. Click Install.
Follow this steps and it will work. If you have any problem , please contact me.