Just go for it. Dress well, something sexy but not what you will feel uncomfortable. Just casual sexy I would say.
Oh...24... at your age I was in crazy mode. Life was a really big playground. Nice time, enjoy it as much as you can.
For quite a few times, I sense you fear your H. Is there any fear? Is your H those guys that can lose it and be kind of violent in some form or level?
His job is not the most friendly I would say, and they tend to be kind of aggressive if there are any issues with depression, anxiety. He is going through a turmoil right now, is there any possibility he would get angry to a violent level?
Now, about you going out. How is that possible that he will know what you are doing? Are you thinking to tell him about this? You do not need, as long as you have a trusted adult to care after your kids, and it will be family, I don't think it should be any issue.
Just be careful to cover all your steps. You do not want to give him a reason to try to get custody from you. Did he ever mention anything about the kids, or is he just fine with the kids being under your care? Maybe he did not even think about this yet, but he will think.
Anyway, going out will be good for you. It will probably feel awkward at first, you are a wife, a mom... that put us far from a woman's world. Try to relax and enjoy yourself.
