My flying dragon citrus tree

My flying dragon citrus tree

I'm terrified! My flying dragon citrus tree has developed these brown scaly things that I imagine are scale bugs, and is slowly yellowing in the leaves and, I think, dying. My mint plant has just died of an aphid infestation that I tried to fix with the detergent method, but I couldn't find a good amount of soap-to-water ratio and it shrivelled up and died. Is there anything I can do about the scale? Sprays, home remedies? And how much soap am I supposed to use when I'm spraying aphids? Please help! Thank you so much!
Painting my walls.

Painting my walls.

Plant ID and possible fungus ID

Plant ID and possible fungus ID

A little of my garden

A little of my garden

Kitchen Re-do

Kitchen Re-do

Garden and Landscape Planning Tool

Garden and Landscape Planning Tool

my little bitty

my little bitty