I’m your same height and started 40lbs heavier. I’m down to 127 after like 15 months. Biggest tip is to count your calories! Don’t listen to the people that say calories don’t matter with IF, they are confused. Get a food scale and weigh everything you eat. Log it in an app. I use chronometer. Don’t be tempted to go below 1200 calories a day because you may lose your hair and mess up your period.
You can still eat McDonald’s occasionally, although I don’t recommend it because you won’t feel your best. Check out r/volumeeating for ways to bulk your meals up without adding tons of calories.
Fasting gets way easier. Don’t get discouraged if it feels hard in the beginning because your body really will adjust and it becomes second nature!