Hello Everyone,I’m very new to bonsai. I had this tree for around 8 months, had it indoor the whole time. I got it in October and from November to February I only watered it once every two weeks and kept it in a cold room. February to May it was doing okay, but starting late May it began to turn yellow. I have tried watering it more, then less, then moved it to a room with less sun but I must be doing something wrong because the tree is still yellow and dry. I’m afraid I killed it.I live in Minnesota, and since it gets pretty cold here I decided to keep the tree inside.

Hello there.

Sorry to be the bearer of the bad news, but this Juniper has been dead for some time already, their folliage stay green for some time after that.
It died because it was kept indoors, Junipers needs to be outside.