It seems to me that reading all that western material has crippled your understanding of how things work with Asian girl.
In the west, you can run a lot of your game strictly on attraction. Not true with Asian girls where I'd argue that QUALIFICATION is the most important phase. In the west, that's not important because girls are so entitled they think they deserve everything. So if a guys runs a lot of attraction and is desirable, western women will fall all over themselves trying to get him.
Asian girls are looking for a guy who really likes and wants to be with them, hence lots of qualification. Playing aloof will almost always blow you out. They aren't interested in some guys who is just going to fuck them and leave.
I think this is your biggest problem coupled with the fact that you run your day 1s too short. To really run a solid set with a high percentage chance of a girl showing up for a day 2, you need 15-20min.
Sure girls will show up on less than that, but the shorter the set the more you're relying on luck than skill. Also, that means that you didn't have time to run much attraction, qualification or comfort, so you'll need to do a lot of that over text. For girls you're keen on you'll have to text them DAILY. Especially if they're any good.
Typically it takes 3 months of solid effort to get results and you haven't been getting any feedback to correct your problems so you have only improved the things you KNOW need to be improved (the approach) and haven't spent any time on the things you don't know about which is A LOT. This means that you've basically been doing the same thing for the past 2 months which is why you haven't progressed further.
Congrats on your first date since your divorce! That's a great step to make.
And just to bury your age concerns, @quantumleap is 52 and he usually bangs girls that are around 25yo. He just closed a 24yo last week, so age is not an excuse. Sure, being younger is better...so is having more money. But you can be successful enough anyway.
"Don't wish it was easier, wish you were better"
-Jim Rhone
Check out @The Animal's Sexy Summer Challenge and Winter Weather Hustle and you'll see what progress looks like.
Good work and keep at it!