Can someone help with the Japanese phrase please?

The second one is more right but more correctly, Watashi wa dokugaku de nihongo wo benkyo shiteimasu. There is no "si" letter in Japanese. Remember this one: sa shi su se so, see, all other S syllable doens't have H but shi. I know dokugaku and benkyo sound redundant but that's the way Japanese talk. If you want to hear the pronounciation IM me so I can pronounce for you in yahoo messenger.