Google Play Store Suddently Crashes in a secound

hello guys i recently have bought a new cellphone called Popüle P3, POP something

the thing is first time i turn on the cellphone i noticed there was no play store installed, so i decided to installed downloading and APK of the play store

i accept unknown sources then i installed, but it didnt work, i tried with a lots more and nothing.

then i saw a video tutorial of how to installed, i had to root the phone it was a really problem because i wasnt able to root it i dont know why and this phone has android 4.1.1 but luckly i did it, then i installed via ES FILE EXPLORER using a vending.apk which is the play store.

then i restart the phone and finally appears the application in the apps panel, but when i run it inmediatly crashes, didnt show up any pop up, just it close up by itself, finally i saw another tutorial which the guy is enable the download manager but the download manager is ENABLE in my phone so the tutorial was a waste of time

what can i do now? the phone is new, should i install a new rom? with android 4.1.1 or higher?

please help me.

hi Joel thanks for answer my question

what should i do to install a new rom, into my cellphone? what should i tell you to recommend me a rom?

thanks for your time.