YOU SAID:
I came to test this tool from the beginning, but then I regretted it
INTO JAPANESE
最初からこのツールをテストするようになりましたが、後悔しました
BACK INTO ENGLISH
I started testing this tool from the beginning, but I regret it
INTO JAPANESE
このツールのテストを最初から始めましたが、後悔しています
BACK INTO ENGLISH
I started testing this tool from the beginning, but I regret it
That didn't even make that much sense in English.