Difference between 은/ㄴ 거예요 and (았/었/였)어요 는 거예요 and (아/어/여)요 을/ㄹ 거예요 and 겠어요 For example:

Differences between:

사랑한 거예요 and 사랑하였어요

사랑하는 거예요 and 사랑하여요

사랑할 거예요 and 사랑하겠어요

Is noun + 관념이 뚜렷하다 a fixed verb phrase meanining ti have a clear sense of (noun)? As in the example 내가 형보다 경제관념이 뚜렷합니다 meaning "I have a clearer sense of economy (finances) than you."?

Question on 는 and 는데 in tje following sentence. I saw this on twitter and I know what it is trying to say, but I don't understand why 하얀오로라 has 는 attached. Shouldnt it be the object of the sentence with the assumed subject being "I"?

핀란드의 하얀오로라는처음보는데 천사같기도하고 아름다워

I translated it as "The place that the white auroras of Finland saw is angelic (angel-like) and beautiful" but that doesnt make sense.

What does the "거라" mean in tue following sentence? 저도 처음 찍어보는거라 앞으로 더 발전해서 열심히 해보겠습니다