Meyers Lemon Tree?

Meyers Lemon Tree?

Hi, my name is Sasha. I recently purchased a Meyers Lemon Tree on my way back from Florida (I live in Georgia). I've had him (yes, it's a him- I named him Harold) about a week now. You've got to forgive me. But can anyone tell me how to properly care for him? I've been checking his soil constantly to make sure it isn't dry- it's nice and hydrated. I only want to water him if his soil gets dry, because I don't want to drown him. Can you guys tell me what (as in, what type of miracle grow) to feed him, and when? And what type of potting soil to use when I re-pot him? I apologize for sounding like a complete and utter idiot on the matter. I want him to thrive and be happy. Moreso, I want to learn as much as possible about gardening. Please help me? :(
My shelf plans for grow lights and seedlings

My shelf plans for grow lights and seedlings

Squash Beetles?

Squash Beetles?

Living Room.

Living Room.

Advice and showing off a bit

Advice and showing off a bit

My closet is NOT included

My closet is NOT included

Cobaea scandens

Cobaea scandens