Q.Indoor plants
I have just bought an Areca plant, I am not good with plants and have tried to follow instructions. I have stood it on a table by a window which gets some sun. I am wondering if I have over watered or under watered because the tips of the leaves have turned brown. I am usually guilty of overwatering but now I am wondering if I have gone the other way!

This article will refresh you on the care requirements.
https://www.gardeningknowhow.com/houseplants/areca-palm/growing-areca-palm-indoors.htm