"hajimemashite" but after you can add "please look after me in the future" or something like that (not really sure of the translation but basically it means something like that~) : "douzo yoroshiku onegaishimasu" for example you'd say "hajimemashite, watashi ha <ichigo> desu; douzo yoroshiku onegaishimasu" if you wanna be really polite ^^

Hajimemashite it s the fisrt thing u will said before introducing ur self mean ' how do u do '' '' dozoyoroshiku '' mean '' nice to meet u''