When shoul I start to workout when I am on 16-hour fasting (8pm to 12pm)?

I have been consistently following a 16-hour fasting regimen for about a month now. However, I am unsure about the best time to exercise, as I feel like I won't have enough energy throughout the day since I fast until 12pm.

I would like to know when is the optimal time to work out. Additionally, could you suggest some equipment-free routines for weight loss?

Currently, I have started incorporating short runs or brisk walks into my daily routine to improve my stamina. However, I am hesitant to try other workout routines I found online because I'm worried about performing them poorly and looking uncoordinated.

Please assume I am a beginner/noob about workout. I don't want to feel my shoulder will pop off on my first day hehe.

Thanks.

Sorry for my English.