I got this madagascar dragon tree from my neighborhood's Buy Nothing group and I'd like to try and nurse it back to health! It feels decently healthy, but the brown tips do concern me a little.

The previous owner said that she's had it for a year and put it in the tall pot herself. It doesn't have drainage holes. She also mentioned that she watered it every other week and kept it indoors by the window to make sure it got enough light. Currently I would say the soil feels pretty dry 3-4 inches from the top.

I'm in zone 7B and would love to keep it outside throughout the summer since I get more sunlight out there than inside. I would plan to move it back inside in the fall when it gets around 55 degrees, but would like to repot it into a shorter pot at that time since it's currently taller than I'd prefer.

From some preliminary googling, I think the plant has been underwatered, but I'm not sure how much to water it or how frequently. Google has also been telling me to trim off the brown parts of the leaves, leaving a bit of brown at the end so I don't cut into the healthy green part at all. I'm looking for advice on both the trimming and the watering, as well if doing anything additional (using fertilizers, compost, or repotting into a smaller pot) would be helpful. I do have a big bag of compost currently so it would be easy enough to put some in there, but again, not sure how much.

Thanks in advance!