The first in Spain were the indigenous peoples with whom the Phoenicians traded.
they already did
The Persians absorbed the Phoenicians into their empire, and used their resources.
The Phoenicians were from the Levant, not Mesopotamia. They passed on their alphabet.
they did not
Spain, Sardinia.
Phoenicians continued trading even when they were not independent.
Spain, Italy.
Tartessos
They invented an alphabet which is the basis from which ours developed.
It was adapted by the Greeks and Romans, and so was passed down to our alphabets today.
Britain, France, Spain, and Africa