I don't know, I was really into design in the past, and am probably more designery than most devs, but I wouldn't do TOO much reading.
Design isn't about how much knowledge you've accrued, it's mostly a journey of self-exploration through work, and looking hard at what you've done in relation to yourself and others.
If you can find someone who will give you an encouraging AND bullshit free take on your work, that'll be a huge help. Oh, and remember how much your first code sucked? Your first design will suck just as hard.
Design isn't about how much knowledge you've accrued, it's mostly a journey of self-exploration through work, and looking hard at what you've done in relation to yourself and others.
If you can find someone who will give you an encouraging AND bullshit free take on your work, that'll be a huge help. Oh, and remember how much your first code sucked? Your first design will suck just as hard.