Your diet is way too high in carbohydrates, both liquid and solids.
Perhaps you and your wife need to sit down and have a talk about what food she will make.
She is the one who raised the concern about your low libido, so perhaps explain to her than in order to raise your libido you are going to need to lose weight, and to do that you will need to go on a low-carb diet. You can then plan together what kind of meals she will make for you.
I don't think there is any point going to the gym if your diet sucks as it does now. It is impossible to out-exercise a bad diet. But for what it's worth: a good beginner's weightlifting program is stronglifts 5x5, the guy who invented it also made a lot of tutorial videos and there is even a stronglifts app that tells you how much weight to load on and when. If you know nothing about weightlifting, it might be a good place to start. But like I said, fixing your liquid diet and solid diet habits should be a priority.
Perhaps you and your wife need to sit down and have a talk about what food she will make.
She is the one who raised the concern about your low libido, so perhaps explain to her than in order to raise your libido you are going to need to lose weight, and to do that you will need to go on a low-carb diet. You can then plan together what kind of meals she will make for you.
I don't think there is any point going to the gym if your diet sucks as it does now. It is impossible to out-exercise a bad diet. But for what it's worth: a good beginner's weightlifting program is stronglifts 5x5, the guy who invented it also made a lot of tutorial videos and there is even a stronglifts app that tells you how much weight to load on and when. If you know nothing about weightlifting, it might be a good place to start. But like I said, fixing your liquid diet and solid diet habits should be a priority.