I am a "guy," as you ladies like to call us. I feel like I want to answer your post even though I may not have the type of response that you are looking for. But I feel like the best way I can offer you "support" is to give an honest response from a "guy's" point of view.
It is courageous to get back into the dating world, and I congratulate you for that. But if I were your brother and I wanted to help you succeed, I would tell you that you need to consider some things about your approach to the dating process. Please take these thoughts in the spirit they are intended, which is to offer a guy's point of view on finding a great relationship.
First, I get the impression from your post that you have not discussed weight or physical appearance with this guy, or traded photos. If that is correct, then in my opinion you are setting yourself up to be rejected. You are correct that "people should care for you based on who you are and not based on what the scale says," but if you show up for this date without telling this guy you are heavy then you are asking this complete stranger to "care for you" even though you are both heavy and dishonest. I think that people who are overweight can be lovable, but I am not too keen on people who are dishonest.
In this world we live in, being fat matters. I'm fat, so I have a right to talk. Dating, especially blind dates with a total stranger, is very much about physical attraction. You know that. By failing to mention something significant about your physical appearance you are lying by omission. That is not respectful to the person you are meeting.
It is true that people deserve love even if they are fat. But you can't expect a guy on a blind date to "love" you based on the "inner truth" about "who you are." He's just there to see if he is attracted to you, and if he is (and if he is a decent fellow), to begin the process of getting to know you. The "loving you for who you are" part, "regardless of what the scale says," is not for first meetings and blind dates.
I think if you are going to try to get back into the dating world right now, you need to be totally up front about your physical appearance, including photos, before you meet the person.
But I can also tell you this. If you are honest about being significantly overweight, and you try to meet people through online dating, you will almost certainly not meet the type of man you'd really like to get to know. That's just the way it is in this superficial world. I'm not saying you don't deserve a relationship right now, but I think that in order to find a good relationship while you are fat it is going to have to be based on getting to know people over time, in person, face to face, and not based on online dating where people make immediate decisions based on three lines in an ad and a small photograph.
If you are sold on online dating, which I have done plenty of myself at various times, I'd say wait 6 months or more until you have lost significant weight from your lap band. This is the time for recreating yourself, facing demons, and getting to know yourself again. Who knows who you will be 6 months or a year from now? Once that process is well under way, then that might be a better time for beginning the process of hooking up with someone to share it with.
I know this is undoubtedly not the type of "support" you were looking for. I hope you will find this "guy's" point of view to be worth considering.
At your age you have all the time in the world. I know you will find the perfect mate at the right time. Best wishes to you in your journey.