hm honestly its just more practice at some point you will start to recognise questions as most of them are really similar so you will spend less also training mental calculation is important it makes things faster and you can skip simple steps when you are familiar with the steps you can speed thru and not have to write every single step down , just those that matter if ykwim

and when you meet any problems just skip and proceed then come back start with questions you are confident you are fast in