If you made it this far, you can continue to do this.
You've accomplished so much already, you can definitely keep it up.
ご質問ありがとうございます。
① "If you made it this far,"＝「ここまで出来たのであれば」
"you can continue to do this."＝「これを続けることは君には出来るよ。」
② "You've accomplished so much already,"＝「既に君はいっぱい達成してきた」
"you can definitely keep it up."＝「これからも絶対続けられるよ。」
ご参考に。
アメリカ合衆国 
