Accent

When speaking in Spanish for the first time with someone I like to ask that where I am from judging by my accent. Usually they do not know the answer because Finnish accent is not known. When speaking with grown up I have not had big understanding problems just with some words but once when I talked to a child and he could not understand me because of my accent. I would like to speak with an accent as close as possible to a native speaker. I should ask some Spanish person to help me to improve my pronunciation.