How long to get from 22% BF to 20? Maybe 18?

WanderingPomme

So today I got a Body Composition Analysis and stood on one of these



Stats:
Age: 26
Height: 161cm
Weight: 52.2kg
Waist: 68cm
Hips: 86cm
WHR: 0.79
BMI: 20.1
BMR: 1204
Fat Mass: 11.7kg (22.4%)
Fat Free Mass: 40.5kg
Muscle Mass: 38.2kg (73.2%)
Body Water: 28.7kg (55.0%)
Impedance: 647 Ohm
Trunk Fat: 18.9%
Visceral Fat: 1.0 Level

Questions:
1. How accurate is this?
2. Can my BMR be actually measured just by stepping on that analyzer?
3. How long should it take for me to get from 22% BF to like 20 maybe even 18? (Wishful thinking lol)
4. Is it feasible that I don't really have access to gym equipment but I do have dumbbells and barbells!
5. Is strength training a good way to help me tone up and lose BF?
6. Any more tips?