Online Communities
The #boobcore community on Instagram and TikTok is the primary gathering point. Search both tags and engage with the content you find. Other relevant communities: r/PlusSizeFashion on Reddit has an active cosplay subgroup; the curvy cosplay community on Instagram has extensive overlap with #boobcore; various Discord servers exist for plus-size and busty cosplayers.
Construction Resources
The Curvy Sewing Collective (curvysewingcollective.com) has extensive resources for pattern adjustments for full-busted and curvy figures. Kenneth King's work on tailoring for diverse figures is excellent. The FBA is covered in detail by many sewing blogs — search specifically for "full bust adjustment tutorial" with your construction method (princess seam, dart bodice, etc.).
Professional Support
Chimera Costumes offers sewing lessons specifically for people who want to build their own wardrobes. One-on-one instruction at $65/hr, covering the techniques specific to full-bust construction, is available in Florida and Michigan.
Mental Health and Body Image
If your relationship with your body is causing significant distress beyond the practical fitting challenges, please seek support from a mental health professional. The #boobcore community is not a substitute for professional support, but it can be a genuinely positive space for connecting with people who share your experiences.