But I don't know the best ways to water sunlight and fertilize while keeping indoors.
This is one of those things where if you don't already know how to do it, you don't want to start trying it out on a pricey plant. I've killed a couple hundred dollars of plants over the years figuring out that no shit really, lighting really is important and just regular white lights don't work, not even if they're fancy LED lights.
It involves grow lights, a terrarium, and even more trial-and-error (or more money) than just sticking the thing outside. If you're determined to do it, however, I'd look into getting an aquarium (because while you can use an aquarium for a terrarium, the reverse is not necessarily true) and its fluorescent light fixture, then getting a grow light for the fixture. By 'grow light', I mean something that puts out light in the spectra plants like - red and blue light. Those are the colors that activate their chlorophyll. This will only solve the issues of lighting, not the problem of the plant's need for a dormant period. On that, you have the option of either sticking it outside or getting more expensive with cooling elements. If it gets cold enough where you live, you can try sticking your setup next to a window - the trick is to get the tree down below 50* F for 2-3 months so it can recuperate.
The reason you want the terrarium, by the by, is because it's easier to control humidity in an enclosure than it is in open air. This can lead to other problems if you don't adequately ventilate it, and I'd heartily recommend enlisting the animal kingdom in controlling the fungal kingdom. Woodlice are my little buddies when it comes to this. If it were a semiaquatic species of tree (which would technically be a in paludarium), cherry shrimp (
Neocardinia davidi, available in a lot of colors other than red but those get expensive) are another good species, as are Amano shrimp (
Caridina multidentata). Snails, on the other hand, are very much not on account of their habit of eating root hairs.
