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This article will help you: https://www.gardeningknowhow.com/houseplants/hpgen/getting-rid-of-mushrooms-growing-in-houseplant-soil.htm

Mealybugs will commonly leave a white residue on plant’s leaves that resemble cotton. You will find this residue mostly on the stems and leaves. This residue is either the egg sacs of the mealybugs or the pests themselves. You may also find that the plant has a sticky residue on it. This is secreted by the mealybugs. Mealybugs look like small, flat oval white spots on plant leaves. They are also fuzzy or powdery looking. Scrape away any white residue and spots on plant leaves. Then, using a solution of 1 part alcohol to 1 part water with some dish soap mixed in, wash down the entire plant. Let the plant sit for a few days and repeat the process. Another mealybug home pest control is to apply neem oil to the plant.

This article will help:
https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm

Generally, if you see a white powdery coating on your pots, it means that the plant was either overfertilized or the water it receives contains chalk. If the powdery substance is on the plants themselves, it usually indicates a problem with powdery mildew.

It would really depend on what plants you were planning on putting in there. Most of the normal houseplants would do just fine, but if you were going to be having something more exotic, like orchids or some of the more fussy tropicals, it could cause problems.

There are several reasons for this happening, but under watering is the most common. This article has other reasons this can happen as well:
https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm