Conditional And a tense and a subjunctive?

Question

How would you use all 3 in a sentence without mixing up the tense and subject and such?

For example: Yesterday, if i had suggested that in the future to get a new car, would i have doubted my decision since today I learned that my friend, Carlos doubted the authenticity of the cars they sold down the street?

sorry. that might not have been the best example. Im trying to combine multiple tenses and the conditional

Answer 1

¿Me creería si le digo que me iré a navegar alrededor del mundo por tres meses después de haber estado entrenando durante 1 año?