It's all relative. Stackoverflow is clearly by an incredible amount more supportive and welcoming to beginners than LKML. :-)
The community is great for beginners who take the time to read the documentation and try solutions. 3D printing is complex and requires putting in the time and the community is happy to help those willing to learn. <joke>Beginners who are actually intermediate or experts with 1 or more CS/EE degrees are always welcome</joke>