I want to convert to Islam but I don't know what is the correct shahada?

I've seen on youtube videos of shahada but some shahada are > Ashhadu an laa ilaaha illa-llah wa ashhadu anna muhammadan rasulullah أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ and some other shahada are > Ashhadu an laa ilaaha illa-llah was ashhadu anna muhammadan abduhu wa rasuluhu أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ، وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ I don't know which one is the right one ?