3. Share Your Knowledge Online
These days, you can teach people anything on the internet through a blog, podcast, YouTube video, etc. Use any of these mediums to share your knowledge and reach as many people as possible. Think of this as even a form of sadaqah jariyah. Because even after you may have passed away, people will still benefit from the knowledge that you have shared online.
Teaching others what we know of the Quran and the Sunnah is not just an act of charity, it is a deed that has the potential to outlive us and earn us rewards till the Day of Judgment. Because as the Messenger of Allah (ﷺ) said, “When a man dies, his deeds come to an end except for three things: Sadaqah Jariyah (ceaseless charity); a knowledge which is beneficial, or a virtuous descendant who prays for him” (Riyad us-Saliheen)