Charity and business are 2 different things. The basics are different and the practices are as well. While business basic is to gain profit, charity is about giving and helping. So, if you have never put giving and helping ahead, forget about charity work. It just not your forte, just go back to your business and make a living out of it. Never become a burden... It never become a basic of charity! Just do what you do best, Assalamualaikum!!