I'm a fitness instructor, and I'm glad to answer your question.
Regarding the frequency of private education courses, your height of1.66m, 58kg, is obviously overweight.
Estimation formula of female standard figure
Weight = (height-100)X 0.8 1
The standard weight is 53 kilograms.
So the first goal is to lose weight, and the goal of losing 5 kilograms needs to be completed in about 6 weeks.
Secondly, if the hip line is not good, it needs local shaping. It depends on your current situation. You didn't send photos, and I don't know your body shape now.
Generally speaking, about 3 months of training can basically improve your body shape and achieve your goals.
I think it is more suitable for you to keep training frequency three times a week for the first six weeks and four times a week for the last six weeks.
I hope my answer can help you.