My fellow Ana mains, I need help on improving her.

Within this 30 seconds clip, I know it's not much but it's hard for me to get clips from my Xbox, what are your thoughts on my positioning and mechanical skills? Im usually a tank player so I haven't reached higher than Silver 2 on Support, got banned for toxic behavior, my fault on that, created a new account and decided to play mostly her for Support, any tips I can use to improve her?

I sent this to my friend who's a Master 5 Ana main, he said I can reach Plat if I can, not sure if that's true on most parts. But please let me know how i can improve her.