Verified answer

Starting from today, I will be taking over his duties, thank you.

or

Starting from today, I will be taking over his duties, thanks for giving me this opportunity, thanks again.

Starting today, I will take over his work, please many will advise

中文：

從今天起，我將接手他的工作，請多多指教

謝謝~

英文：

Starting today, I will take over his work, please many will advise

Thanks ~

Since today, I will take up his work, please give advice or comments

Starting from today, I will take over his work, a lot of advice.