You might not see it now, but your hard work will pay off in the end.
You might think it's a waste of time, but it'll all be worthwhile.
①You might not see it now, but your hard work will pay off in the end.
You might not see it now→今は見えないかもしれないけれど（そう思えないかもしれないけれど）
your hard work→あなたの頑張り・努力
pay off→報われる
in the end→最終的・最後には
②You might think it's a waste of time, but it'll all be worth your time.
You might think it's a waste of time→時間の無駄だと思うかもしれないけれど
it'll (will) all be worthwhile→（時間・労力など自分がやったこと全て）価値がある、その甲斐がある
少しでもご参考になれば幸いです。
日本 
