If you haven’t seen your design, I encourage you to get your Human Design bodygraph.
Bodygraph is a map, a blueprint, a genetic code you have received at the moment of birth.
You can get it for free here: https://www.jovianarchive.com/get_your_chart
If you don’t know the exact time, you can try checking with your birth certificate or talk to a Human Design expert who can identify some patterns. Also, some design aspects are the same regardless of the exact time.