Sad plant. New to house plants

I bought this calathea a little less than a month ago ive only watered it once about a week or so ago. I waited to water until the soil felt dry. I used distilled water and bottom watered it and it's by a SE facing window the curtains are normal closed so it's pretty low light. Any tips to perk it up would be helpful this is my first indoor plant ive tried to do research but I'm still new