It would really depend on what you are able to do with what you would set your goals at doing.
Can you walk a mile comfortably? Can you walk a mile in 20 minutes?
Can you do a modified pushup? Can you do 10 modified pushups?
Can you do a squat? How many squats can you do? How deep are your squats?
Can you do a lunge? How many lunges can you do? How deep are your lunges?
Can you do a plank? How long can you hold the plank?
Fitness goals are great but you need to know where you are at before you know what you should set your goals at. Also, what would you like to do?
BMI or weight doesn't determine your fitness, level, your fitness level determines your fitness level. So someone who has the same BMI as you could run 5 miles while another person may not be able to walk a mile.
Right now, one of my goals includes doing deeper squats and working on my squat form. I also am working on building enough upper arm strength to do rock climbing. Last year when I was around your weight, my goals included being able to do a strenuous 5 mile hike.
You can't out-exercise poor eating habits.