Now that I think about it, I’m glad I tried my best.
When I think about it now, I’m really glad I worked hard.
Looking back now, I’m glad I studied hard.
「今思えば」- Now that I think about it./ When I think about it now. です。
Looking back now- 振り返って今を思えば。
❶Now that I think about it, I’m glad I tried my best.
(今思えば、ベストを尽くしてよかった)。
❷When I think about it now, I’m really glad I worked hard.
(今思えば、一生懸命頑張って良かった)。
❸Looking back now, I’m glad I studied hard.
(振り返って今を思えば、一生懸命勉強しといてよかった)。