Happiness is found where Allāh ﷻ and His ﷻ Prophet ﷺ are remembered and praised. People work to collect money but this doesn't give them happiness. To be in Paradise in this world and the next, look to please Allāh ﷻ and be with the Awliyā’ and the Mashāyikh. Don't be hopeless or complaining. Who is at peace with himself is in Paradise.