My plant is slowly dying

Hi all,

I've been plant sitting for 3 months (with no experience), it was perfectly healthy when I got here and now I can see some leaves turn yellow on the outer leaf, and one leaf has a big hole as in the pictures.

-I don't water it a lot, I wait that the soil is dry because I'm afraid of watering it too much. (Once every 10 days and it's spring)

-It's indoors, has a lot of light but sometimes I can forget to open the blinds, and always open the blinds at different times depending on when I wake up. It's right next to the window.

-The plant pot has holes and and a plate underneath.

-I don't know if it's the kind of plant to be thirsty or to florish with little water

Do you thinks it's dehydrated? Or do I need to be more regular about the time I open the blinds?

It's probably something I'm doing as it's was healthy before I was taking care of it.

Thanks all !