I bought a monstera last week and a couple of days after bringing it home, I gave it a little bit of water. I noticed that ever since the leaves are sweating - did i overwater? I poked some holes in the soil to aerate it but it is still sweating. The leaf tips are starting to point downward, and one leave is curled inward. I've researched all of this and can't tell if it is overwatered, underwatered, or what.

Your plant has edema, your first step is adjusting your watering habits. Most plants should never sit in water, so remove those saucers and make sure big pots are draining well. Improving air circulation around plants will help reduce humidity to a safer range.
Sometimes Increasing light intensity is helpful for many plants with edema, but be sure not to cook them by moving them too quickly into brighter light. Make sure you research the correct lighting needs for your plant.

Thank you! I will try giving it a bit more light and moving it to an area with better air circulation for a bit. It's not in a saucer yet as I brought it home just last week, so I haven't fully soaked it yet to the point of needing a saucer.

I have another question, actually - I am new to indoor plants and my newest additions are the Monstera, a Rose Calathea, Algonema silver bay, and golden pothos (all which I hear are easy to maintain..let's hope!).

I don't intend to give any of them fertilizer right away, but I did order this indoor plant fertilizer:
"J R Peters 52024 Jacks Classic No.1.5 20-20-20 All Purpose Fertilizer"

Is this a good fertilizer for the indoor plants I mentioned above?