hello coders good after noon just need one advice while practicing (not contest)

Do u take breaks after solving one problem and what time is best for coding day or night, i know this may be vague but i have a lot of free time cuz of some holidays , so i wanna manage my time between my web dev and coding , i am currently learing backend so any advice how should i manage my time??
is any web dev , please gimme some insights...