How do you say hi im Cameron in Japanese?

Answer 1

キャメロン /kya me ron/ and カメロン /ka me ron/ are both Japanizations of that name. Only difference is in pronunciation of the 'K' consonant in Cameron, where in the former it is said like in 'capture', and in the latter it's just said slightly bolder like in car.

Answer 2

Konnichi wa, watashi wa Kyameron desu

not in Japan names are surname first given name last, and people call each other by surname with "san" on the end, so I would be "ワードマイケルさん", which is "Wādo Maikeru-san".

Also Japanese don't tend to use first names unless invited to do so so unless i asked otherwise i'd be "Wādo-san"