I think you mean 'a little later'. Drop the word 'out' and change 'in' to 'on'.
The construction of the sentences is not too good. Do you have to use the words 'instantly or a little later' together as part of your assignment?
An easier way to say similar would be "You can easily find a small nation on a map." If it is a specific map and it has been previously introduced, "...on
'Instantly' is not a good word - in my opinion - because very few things happen 'instantly'. I am sure it would take at least a second or so to find something on a map - which is not instantly. 'Instantly or a little later' sounds awkward.
Instead, consider saying, "Spread out a map of the world. You should be able to find the nation quickly, but it may take a little longer if it is a sma
How about "You can find the nation on the map within a few seconds or more."?
Actually, no one have to find it so quickly because it is not obligatory.
What I want to express is just possibility. So to speak, in some case, you can find it easily, but in other case, you cannot find it so quickly (because it is a small nation, for example, Fiji, a little island nation).