I don't know about the Soprano laser treatments but I can tell you for sure that you are still a pretty woman. You say you used to get admiring looks, but not any more. Well you are only 51 so you are still in your prime, and if you were attractive when you were younger then you still are - nobody changes that much until they are around 80. It's all about how you see yourself and banishing horrible memories of those untrue insults you had to endure from your ex.
You just need to get your confidence back and learn to smile again which is also a facelift to the muscles all at the same time.
Some people like Botox - I tried it around your age but it took away the expression from my face and made me less attractive so not for me though it did relax those cross looking 11s for a while.
I also have those smoker's lines which I hate - I haven't found a solution but I tell myself they don't notice as long as I keep smiling and animated (hopefully without appearing demented!)
I had an early short lived marriage to an abusive man who did nothing but insult me and abuse me. It took years to recover my self esteem but in reality I was extremely pretty when young, and I know I am still attractive now at 61 even with all my expression lines. I am sure the same is true for you 10 years younger than me.
Good luck with online dating but please don't rule out men in their 60's - there are lots of lovely older men and just as I hope they wouldn't rule you out because of your age I hope you don't do the same. You will be reducing your chances and might miss meeting someone wonderful.
My H is 63 and is a very handsome man who still plays in a band and is great company. I'm glad he's with me but if he was single and on a dating site it would be very foolish to write him off because of his age! In truth he would probably be snapped up by some gorgeous woman in her 40s.
Simple advice?
Drink lots of water, do lots of walking, take great care of your teeth (electric toothbrush, whitening toothpaste), hot cloth cleaner (like Liz Earle) morning & evening, serum like Boots No. 7 Protect & Perfect, Moisturising Day cream with high SPF like Nivea Q10 Plus anti wrinkle SPF30 / Nivea Q10 Night cream.
If you are fair dye your eyelashes and tend to your eyebrows, ie fill in patches with brow powder and bevelled brush - good eyebrows can take 5 or 10 years off.
Camouflage mouth lines with Clarins Instant smooth. Expensive but worth it.
Stop wearing foundation, it just gathers in lines. Instead dab a bit of Bare Mineral powder only exactly where you need it with a small brush to cover red veins or other problem areas.
Light touch of blusher in pink or coral, depending on your colouring.
Use a diffuser / concealer such as YSL Touche Eclat for dark shadows.
Good luck tomorrow for your consultation.