Have you ever explained the theory with chalk, tried the theory and actually struggled with it? Are chalk routines and reference answers reliable?

With two years' experience in landing for exams, I'll give you some advice.

It doesn't matter what software you use, brush the real questions, be willing to work hard and spend time, find your own papers, download videos to see the skills, and brush the questions hard. Landing is not difficult.

There is a disadvantage in doing problems with software, which can't cultivate the sense of touch, and the answers often encounter mistakes and omissions. It is meaningless to do more simulation problems in software. Not much improvement. Especially in data analysis and application, you can't improve without training. I use chalk and other software tools, only to brush a few questions during the fragmentation time. I really regard it as a treasure. I want to go ashore and live a dream.

Personally, I think the best way is to spend the whole time brushing paper to do problems, watch videos during the break to learn some skills, and use the rest time to do problems through software to deepen your impression and improve your skills.