very easy
If you (can) visit any country, where (you go)?
If you could visit any country, where would you go?
Если бы у меня было больше свободного времени, я бы путешествовал по миру
If I had more free time, I would travel the world.
We won't go to the USA this year. We can't afford it.
We would go to the USA this year if we could afford it. / If we could afford it, we would go to the USA this year.
If I (can) meet one singer, I (choose) Baskov
If I could meet one singer, I would choose Baskov
Если бы она говорила по-испански, она могла бы общаться со своими родственниками
If she spoke Spanish, she would be able to/ could communicate with her relatives
My job is boring. That's why I don't enjoy it.
If my job wasn't boring, I'd enjoy it./ I'd enjoy my job if it wasn't boring.
I (buy) a new BMW if I (be) a millionaire
I would buy a new BMW if I were a millionaire
Если бы они выиграли в лотерею, они бы купили новый дом.
If they won the lottery, they would buy a new house
She doesn't earn a lot of money. That's why she doesn't travel.
If she earned a lot of money, she would travel. / She would travel if she earned a lot of money.
Darina Leonidovna (be) happy if I (can) learn Second Conditional
Darina Leonidovna would be happy if I could learn Second Conditional
Если бы я был котом, я бы смог спать весь день
If I were a cat, I could sleep all day
I don't learn Second Conditional at home. That's why I can't do my homework without mistakes
If I learn Second Conditional at home, I could do my homework without mistakes. / I could do my homework without mistakes if I learn Second Conditional at home.