Personally, I wouldn't recommend IF while you are still obese. You need to work on fixing your damaged metabolism and avoid cortisol issues. Eat good food and get good sleep, when you are a bit closer to goal, it's a great way to push to the end.

Also, if you have any eating issues (which many obese people do) IF can exacerbate those and cause more binging or excessive behaviors.

I like Robb Wolf's take on it. Fix everything else, then play with IF. I wish I could remember the podcast.

Eat well. You will probably not need IF for at least the first 30-40 lbs to come off which will take about 6 months or so.

After that you can assess, you might choose to up your activity before you IF and that is probably another slow 20ish pounds with a lot of shape changes.

You might want to to IF for the last 10 to 20 lbs but only after a longer relationship with this way of eating and once you stop feeling as much hunger.

Just to reiterate - DON'T do IF until you have everything else dialed in. Eating better food will have a much bigger effect on weight loss. Once that stalls and you've started a reasonable exercise program then you can start to think about IF. I think the benefits of IF are overstated and that generally 3 good meals a day is just fine. Use IF as a way to not worry about meals rather than planning IF. What I mean: if you're running late getting home one day, just skip dinner. Call that your IF. Don't plan it.

Didn't 'health correlator' have a couple of posts recently on how overweight individuals who IF don't lose as many calories as a normal weight person?? I believe this would support the points others are giving above, i.e. don't worry about IF right now.