Methadone withdrawal is a difficult experience. I won't sugar coat it. But just like any other withdrawal a strong mind and positive mental attitude can make a huge difference. I assume you've been through Opioid withdrawal before? If you're on Methadone or seeking it, I can only assume that you have.
Methadone withdrawal features all of the major characteristics of say, Heroin withdrawal, just a little more mild and protracted. I think you'll find that, if you have the proper kit of comfort meds, nothing crazy, it's a manageable syndrome. What got to me eventually was the length of time. Instead of 3-4 days of sickness, I experienced about 2 weeks of truly acute withdrawal, followed by a few weeks of apathy, anhedonia and insomnia. I didn't get any sleep at all for weeks besides short naps during the day and in the evening. The lack of sleep is what truly got to me. I've never desired sleep so much in my life.
It's doable, don't be afraid, but look at it realistically. It will be hard, but I've done it and I'm not especially tough, so I'm sure you can do it OP.