Congestive Heart Failure - Questions

Hi all, my dad just got told he has congestive heart failure. I’m kind of wondering what some major symptoms that it’s bad are, what I can help with, or what can be done.

History:

Current Age: 70

First massive heart attack: age 41

Massive stroke, died and revived: age 65

Open heart, defibrillator, pacemaker: age 65

Diabetes: age 56

Quit smoking: 65

He has had at least 6-8 stents between 41 and 65. Doesn’t eat right, is sedentary and does not take any regular medications like he should.

From what I’m reading, being diagnosed with that, 50% of people under 65 survive 5-10 years. I’d say we won’t have 5+ years here with how he doesn’t care for himself.