How can I improve my runs ? I can do perfect runs with my low voice but somehow I cant do it with high notes??! You know what I mean?

Oh also this is my second month and I have already improved my singing a lot thank you for this amazing website and this amazing lessons it truly help me a lot. But I also would like you to do more high notes and head voice and falsetto lessons I'd really appreciate that <3 

So glad you're enjoying and improving! I'd recommend you incorporate some exercises that focus on agility, and keep singing once you reach head voice - see here, for example. 

Here's a lesson with 4 exercises to help you sing higher in head voice without straining, too: https://www.youtube.com/watch?v=yTeldyMrs6A.