I know just a little tiny bit of Japanese, since I studied it for fun for a while. I forgot a lot of stuff, since I do not practise it anymore but here's a basic and useful sentense you could learn:
Konnichiwa! Watashi wa Lolita desu. Hajimemashite!
Hello! I am Lolita. Nice to meet you!
I wish their writing system was simpler because that's the only thing that keeps me from fully learning it. If it was simpler, Japanese would be quite easy to learn, imo, because speaking it isn't that hard. The pronounciation is familiar, there's no tones differences and the grammar isn't bad.