Hello! :) New here as well, but here is my understanding:
Snakes do not suffer from inbreeding the way mammals do. As long as you have two healthy animals, they are fine to be bred to siblings or parents (called Line Breeding), and this is a common and accepted practice, often intentionally to strengthen certain traits or proof morphs.
However, long-term inbreeding may cause problems to start showing up, so adding new genetic material into your breeding project is recommended (called Outcrossing). Generally if you Line Breed one generation, you will then want to consider Outcrossing the next generation.
Here's an older thread that touches on this subject: Line Breeding / Outcrossing
Hope this helps! :)
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