Welcome to the forum and great to see you posting for some support here. I am sorry to hear you have gone through some bumpy times with your parents separation. These changes can be really stressful and can throw anyones good patterns of eating out of whack. Getting into an unhealthy eating routine can be tough to break but you clearly want to make some changes. Reaching out for support here on the forum is great first step and I wonder if you might take this a step further?
Recently, there have been some changes to Medicare where people with a diagnosed eating disorder can get subsidised (free or very cheap) counselling and appointments with a dietician. As each persons body is unique, it would be great for you to access a service that could tailor a program to your individual needs. I have attached a link to the information about this new funding pathway to care which is posted on The Butterfly Foundation Website. https://thebutterflyfoundation.org.au/understand-eating-disorders/medicare-changes-information-eating-disorders-2/
I wonder if you have had support from a psychologist, dietician or counsellor in the past? If so, could you access them again? A visit to your GP might be the first step forward towards getting the right support, the first time. Learning to have a healthy relationship with food and nutrition takes time and is a journey. If you require some immediate support, don't hesitate to call the Butterfly Foundation on 1800 33 4673 from 8:00am to Midnight / 7 days a week or you can use their chat or email support https://thebutterflyfoundation.org.au/our-services/helpline/
We are here and we are listening. Please let us know how you go in getting the right advise.
Wishing you the best possible outcome,