What to train to achieve this physique?

I’m 21, female, about 170cm/5’7” and I weigh around 70kg

I’m very new to fitness and everything related to it, what would be some pointers or good exercises to achieve a build with

• defined arm muscles
• slim waist
• toned stomach and back

I have time to exercise 4-5x a week

Any tips for exercises, routines/splits, diet are welcome :)