Not really what we do here… but we can help you learn about using Blynk and toss you some ideas and research recommendations so you can learn how to do it on your own.
Search this forum for keywords like Rover, Car, Motor, etc…
I have made this one…
And this one…
I have used various different Apps on the 2nd phone for the FPV… search Google Play for things like phone IP camera… you may have to try a few until you find one that works well (the URL) with the video widget, your phone and your network.
NOTE! It will NOT be true real-time…more like a few seconds delay, to almost unusable, depending on your network and whether you run the IP camera on 5GHz while the MCU runs on 2.4GHz, or both on same frequency.