Michelle, there is a total socialite in you somewhere. You're such an important presence here, if you'd have the confidence to get out there, I can see you enjoying a night with the girls!
We all have so much respect for you and draw from you in terms of weight loss. You have physically turned yourself into a whole new woman!!!! If you're unhappy with other parts of yourself, you can change them too! What's shyness compared to over 100 pounds?? Different, yes, but you can so do it!
You absolutely must get a job, m'dear! It can be a nerve wracking process, but making your own money will really be freeing and satisfying!
You will be able to gain some independence and confidence, ease your husband's financial problems my making a contribution of your own.
You will be able to enjoy some nice social conversation with new people.
Because you'll be away during your shift, you'll actually be able to look forward to going home!
Imagine being able to buy the groceries yourself, and making your husband a nice dinner that he didn't have to worry about the cost of. Or see a movie. A date!
You could start by walking to work - get some activity in

When you have more money, you could get bus passes, arrange a car pool with someone, get a bike! Sorry, dear, you aren't fat enough for your body to be an excuse
And who cares what kind of job it is, or if you have any job skills? Get a part-time one, if you prefer. Some places include uniforms, so you wouldn't need a new wardrobe. I work in a cafe, running around all day (admittedly, partly running from the desserts.) I enjoy seeing so many people every day! Work at a grocery store, where you'd also be on your feet a lot and it would contribute to your amazing progress. My BF works at a McDonalds and he Gets *amazing* insurance
I'll give your husband a benefit of a doubt here: Maybe if you're less of a financial burden and someone who needs to be taken care, he can start appreciating you for the person you are?
Being financially independent will give you many more options in how you actively work on your marriage - and gives you other options in how to take care of yourself if the marriage doesn't get better. This really is your next step
And you know we'd all be cheering you on and excited to hear about it.