"but i don't have enough money" it's present tense.
"...so i must work hard and earn money to travel" (it makes more sense) hardly is the opposite meaning of hard. The adverb hard is used to modify a verb and means that the action is being done very intensely. So, to work hard, means that you are making a big effort at your work. The adverb hardly is used to modify a verb and means that the action is not being done very intensely. Therefore, the adverb hardly has the opposite meaning of hard, and reduces the intensity of the action. I didn't quite understand a part..."traveling is my storess corping.." what do you wanna say? it's ok if you say it in japanese. Also "...traveling.....gives me happiness. "i'll change the passport that i have now for a/the 10 years passport"