how do you know if singing the correct notes??

how do I know if I'm sing the correct notes in the  lessons. I can't recognize notes by ear. or tell if the notes I'm singing are correct. any help? 

Hi, Ben! I recommend these lessons:

https://www.30daysinger.com/tutorial/how-to-sing-in-tune-for-beginners-part-1/1

https://www.30daysinger.com/tutorial/how-to-sing-in-tune-for-beginners-part-2/1