finally i arrived in Australia

it wasn't a easy trip to Australia as I needed to detour at Malaysia. but now I arrived at Brisbane from goldcoast airport safely. hope everything goes well ! safe and sound

Finally I have arrived in Australia

It wasn't an easy trip to Australia as I needed to detour in/through Malaysia. But now I have arrived safely (you could phrase this differently but I think it sounds more natural here with the adverb following the verb immediately) in Brisbane from the Gold Coast airport. I hope everything goes well! I hope I'll be safe and sound/I hope you're safe and sound (I'm not sure if this is a wish for someone else, or an attachment to "I hope everything goes well" - "I hope everything goes well and that I'll be safe and sound" or "I hope everything goes well, that I'll be safe and sound")