Welcome to 3FC! If you go over to the
300+ club forum, you'll find a lot of us that have a longer road to wellness. But feel free to search the whole site.
I like your focus on getting healthy rather than getting skinny. Skinny is not the definition of optimum health! A healthy person eats nourishing food, gets plenty of sleep every night, drinks lots of water, exercises and stays active. A healthy person also has and maintains a good social life and has friends that support their goals. That's what you're shooting for.
As for exercise, start with what you can do, what you can do regularly at least three to four times a week and find what you really enjoy doing. Don't worry about not being able to do it for very long. That will come with time.
As for that scale, that's only one sort of measurement to rely on. Get yourself a good tape measure too. Because there will be days, or even weeks and months, when that scale doesn't seem to want to budge and you're really discouraged, but you find it odd that your jeans are getting looser. So tracking your measurements helps a lot with motivation too.
And finally, don't apologize for "long" posts. You write what you need to write. This is a place for sharing!
See ya round the forums!