|Your plan of shakes, fruits, and veggies, with a sensible meals sounds great. You can either make your own sensible meal, or you can purchase entrees. You can use either HMR entrees or grocery store entress that are 300 calories or less.
I am sorry to hear that the classes do not work for you, but if you stick with the plan that you have, then you should start to lose weight.
As far as which shakes to use, any of them will work. If you are lactose intolerant, then the 70+ shakes are the best ones. Otherwise the 500 or the 120 will be the best. The 500 comes in single serve packets and the 120 comes in a canister with a scoop. It is just a matter of whether you want the convenience of the packets.
I wish you much success.