Howdy Kier. The basic greetings depend on the time of day.
Good morning: おはよう(ございます)/ohayō (gōzaimansu)
Daytime: こんにちは/konnichiwa
Evening: こんばんは/konbanwa
When meeting new people you can use:
はじめましてよろしくおねがいします
hajimemashite yoroshiku onegaishimasu
To politely give your own name:
XXX と申します
XXX to moushimasu
It’s nice weather we’re having isn’t it! (A polite conversation opener)
いい天気ですね!
ii tenki desu ne!