Currently with no partners (see my posts here and
here), I decided to try and improve my individual play, especially my declarer play and squeezes. I get everything about the simple squeeze - the one loser, the three types, and so on. I have a basic understanding of triple squeezes, and even pulled one off thanks to an unlucky opponent pre-empting. What currently is tripping up is the double squeeze, and that seems to dash my hopes for more advanced stuff beyond simple endplays and coups.
I understand that you should have only one loser, that there's a R suit, L suit, and B suit, and after running the free suit, you generally run the L suit. However, being able to put it into play is non-existent. I can see hands where it could possibly work, but either I don't properly visualize the squeeze running, or there isn't a double on the hand. Take this hand from tonight. I see it, and actually run it properly, but I confuse the R and L suits, and miss that overtrick I deserved after less than perfect defense.
I feel like I'm beating my head against the wall, and just want advice on how to improve this aspect (squeezes, not the beating of the head against the wall, just to be clear

), and maybe visualization in general. If I can improve upon this and the partner, then maybe I don't have to give up this game while still in my 20s. Thanks for everyone ahead of time who has anything constructive to say.
"It's not enough to win the tricks that belong to you. Try also for some that belong to the opponents."
"Learn from the mistakes of others. You won't live long enough to make them all yourself."
"One advantage of bad bidding is that you get practice at playing atrocious contracts."
-Alfred Sheinwold