Everything "I come up with" has already been done, any tips?

First time on this sub and sorry if this has already been asked but l'm feeling burnt out. I had some cool ideas for a story and wrote them down, I was very happy with my ideas and thought they were unique until I found out that most of them are very similar to D&D and specifically the Forgotten Realms. I've never played D&D and had no knowledge of the FR lore before I started worldbuilding. Should I just scrap everything and give up?