Don’t worry about your English , is actually quite good. Related to your heart rate in swimming , it seems to me that you need to build a better aerobic base by working more time on zone 1 and zone 2 , that will help you a lot with you capacity while swimming or running.
As general preparation you can use other sports to prepare for your goal, but all the training should become specific and close to what you are going to do on your main event.
I don’t understand what you mean with the 10%, 20% etc , but it would be important to have a more organised plan directed to your goals.
In general you are already doing 2 strength training per week that is really good , you need to work in zone 2/1 to build a better aerobic base , raising the volume slowly towards the distance/time your area going to do on the Aconcagua climb , after the good aerobic base start putting muscle endurance workouts.