Recommendations

Without knowing anything about you, here's my generic advice:

Go here: https://www.myfitnesspal.com/account/change-goals-guided or More > Goals in app.

1. Put in your stats.
2. normal daily activities refers to your job.
3. Ignore How many times a week do you plan on exercising? - that does not get included in the equation. Log your exercise separately.
4. Select a rate of loss in line with the chart:

The resulting calories is your daily calorie budget. It's normal to go a little over or under, but since weight loss is already included in these calories, you don't want to intentionally go hundreds of calories under.
With this little to lose, it's going to be slow, and should be slow, as you do not have the fat stores to support a more aggressive rate of loss. I suggest using a weight trend app, such as Happy Scale for iphone or Libra for Android.

See also: https://community.myfitnesspal.com/en/discussion/10636388/free-customized-personal-weight-loss-eating-plan-not-spam-or-mlm/p1