I had a Dracaena like this one before, it lasted for about 1 and a half yrs. I never changed its soil or pot, it was supermarket bought. But it grew a bit and I didn't notice (I only noticed after I compared some pictures) so I think it dies because I needed to change the soil and pot.
Anyway, I got another cos I love the look of it, but I want to really care for this one! I changed its soil last week (at about 3, 4 weeks after I bought it) with universal one. I keep it in a semi light/semi shade place (just like the other one) and it seems ok for now, but do you have any tips for caring for it? Light, water, soil, how big of a pot and everything?!
The second is a mini tree from the supermarket, I love trees and I thought it doesn't get better than having a tree inside. Though I read after that they don't really last inside

I'm new to plants. Until now I would just buy another one if the store bought one dies, but I really want to learn how to take care of them! Any help would be great!
(please excuse any language errors, En. is not my first language)