I do research and development and sales at the same time. How can I play back freely, such as acting quickly?

First of all, you should invest in research and development. It's not easy to concentrate when you first go to work in the morning, so it's best to put research and development in the afternoon. If you invest in research and development, you can continue to work overtime, so there is plenty of time. Secondly, sales don't have to be lively and outgoing. The key is to know how to read and feel. If you really can't have both, I suggest you give up one and become your major.