Humility is a good quality.
Now here is some other advice for you :) It's worth what you are paying for it.
The age thing. Hey, I get it. Preferences are preferences. But you might want to rethink this one a little. There are two reasons. Here is the first.
Look at your computer monitor. There are pixels on the screen. Chances are there are 1920 across by 1080 down. By trying to find a woman who is 25 who wants to fuck a 49 year old, well, that is like limiting your screen to about 5 pixels. Are they out there? Yeah. Is it easy to find them? Nope. I am a couple of years older than you and I have been with a 19 year old and a 72 year old on the spectrum. Ironically, they were back to back on different nights. The 19 year old was the worst sex EVER. The 72 year old, well, that ties into the next point. When you go to a club or bar to meet a woman, do you ask her for her ID? How do you check her age? Or do you go for attraction first? For me, the 72 year old, omg, I had guessed she was late 40s early 50s. Hell, my wife did. And so did a bunch of other people. The sex was very good and quite enjoyable. I didn't find out how old she was until after the fact. I was floored. My dick didn't ask her age :) My dick liked her!
Now back to the pixels on your screen. If those are all the couples and single females out there, you are already limited to as to who will want to be with a SM. It's a small subset. And in that subset, you are going to find that the majority of women in it are at least in their mid 40s and if not older. Why? Because they and their spouse are much more comfortable with each other and their sexuality. People take time to get to their comfort level. Women, as much as people want to think it is like porn, are picky, finicky and insecure. Does a 32 year old, who has been married for 6 years want to tell her husband, "Hey honey, you know I love you, but I want to go fuck a lot of single males." Yeah . . . it may happen, but it probably will not. Now take a 45 year old woman who has been married for twenty years. By that time she has learned that her husband ain't leaving her. They have been in the lifestyle for 12 years. They know what works for them. She says, "You know, I'd like to start fucking a lot more SMs either MFM or solo." She says this because they are comfortable. So determine how many pixels you want lit on your monitor :)
Now the weight thing . . . I think you should change your profile around. Congrats, you have decided to workout and probably eat healthy. We are a fat nation and you are probably in one of the fattest states. There are different ways to say what you want to accomplish. For me, I realize that I can stand to loose weight and hit the gym. However, I can see my dick and would be what I call a typical american. I need to lose about 15-20 lbs. Am I attracted to 300lb women. Nope. Do I need to sit on my computer and scream, "No fatties!" Nah. No gain. I can say that we are looking for people who may not be in perfect shape, but do make it to the gym before they go out for ice cream :) You said the same thing, but you didn't call the person reading your profile a slob.
For the lifestyle to work for you, what's going to have to happen is someone is going to have to take a 'chance' on you. What you want to do is find meetups and go. Find parties and ask if they let SMs in. You will eventually find a couple or SF that will fuck you. Then, if you do a good job, you will pray that they tell all their friends about you. If you do a terrible job, well, they WILL tell all their friends about it. But if you do that good job, you will get passed around. You will move from group to group and have a great time. That just takes time. Like I said before, there are not 10,000 supermodels waiting for YOU.
Good luck and let us know how it goes.