how often would you suggest I water it and what can I do about it being too dry?
Watering all depends on how often the soil requires watering and it will be different for everyone, I will tell you a pro tip- take a long bamboo squewer and put it down into the dirt until only 1 inch sticks out of the soil. Leave it in the dirt all the time. If you are wondering if you should water, pull the stick out and feel it. Feel it at the bottom middle and top, if the stick is soaking wet- don’t water. This will get you to know how long it takes for your soil to become dry.
See if you can get those lights to be above and better pointing to the plant. The light on the right is not shining on the plant enough.
As for increasing humidity, you could put the plant and those 2 lights underneath that desk and wrap Saran Wrap or clear plastic all around it and create a little green house. Is that a cold basement floor or a warm upstairs room?