I can't do it all in here, It'll be too long...
It's simple! If you have to write It on a paper grab a paper and start out with something simple..If you have to it in the computer you just do the same thing.
Search up everything to know about argentina, depending on what your going to write. And start listing those things on paper.
1st and 3rd persons are easy! If you have to write the whole thing in Spanish, I suggest to go online if you don't know some past- tense, future tense and stuff in Spanish..you study it for a about like 20 minutes. It'll be good, this takes time, that's why I can't answer it ALL in here..
It's simple and I hope this helps, sorry if I sound like a teacher or anything. My apologies for not writing the answer you expected.xx ;)
