After getting any vaccine human body make antibody and keep memory to fight that virus or any other organisms.
So as your have to said that you have taken 1st dose of vaccine so your body have some immunity with against covid virus so chances of side effect of 2nd dose will be less with respect to 1st dose.
But antibody profile depend on many factors like vaccine status and good life style like good diet and exercises so after taking vaccine many persons shows the low amount of antibody in their body and also got infection from the covid again and again.
So by the rule you should take some rest after vaccination but if not possible to stop then go ahead to your work but do work wisely and don't do heavy work for 1 week.
Next Steps
You should follow good life style .
Health Tips
Keep postive attitude to fight any disease and any problem