What are you leaning towards?
You can grow tropical and semitropical plants, but you will need additional lighting to overwinter them indoors.
Temperate climate (most deciduous and conifers) trees need to stay outdoors year round.
IMO they are easier.
You can read about "indoor trees" at
Bonsaihunk.
A large listing of outdoor trees can be found at
Evergreen Gardenworks in their products section.
I realize you're not in the USA, these links are just for informational purposes.
You also need to know what number corresponds to your
Hardiness Zone.
It helps if you include that in your profile.