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Of course you can find support here!
The basics of losing weight: Eat less, move more. How that's accomplished is very individual, but there are a few things you can try to start.
You already have a goal in mind to lose about 100 lbs, so how to go about doing this?
Food intake is very important. Monitoring how much you eat is likely going to be the most important thing you do when it comes to dropping weight. There are many different methods. Calorie counting, carb counting, mindful eating, counting weight watchers points, etc, etc.
Adding in activity keeps the momentum going. It improves energy, mood and helps build muscle, and endurance.
You don't have to dive in head first, if it feels overwhelming. You can start small, make it a habit, and then build up over a period of time. As an example of that, I knew I had to start exercising, but was incredibly sedentary. I started out walking for five minutes a day. Just five minutes! But, I've made it into a habit, am -still- walking every day (for longer) and have added in yoga.
Start small, make it a habit first, then build up.
Don't expect perfection, just plan for improvement. That's it. Keep going, keep making improvements and the weight will come off.
Is there a food or movement plan that you're interested in trying out? Let us know and we might have more specific ideas in mind.