Umbrella actually uses some of the awesome EFF SSD content for some of our digital security stuff. Clearly we've broken a lot of stuff down to make it work in an app. Probably the major big difference is that Umbrella has a huge amount of stuff on physical and operational security. Along with psychosocial issues like dealing with PTSD in the field.
Our content (like EFF SSD) is CC so available here: https://github.com/securityfirst/Umbrella_content
I'm directly interested as I'm putting together my first resume.
Point of a resume is to get an invite for an interview.
Generally speaking that you'll get/create the most value by knowing as much as possible about the job, company, staff, etc. - and if possible speaking with the hiring manager before providing a resume; it's rare that a company won't want a resume at all. By delaying handing over a resume though, you have the most opportunity to match it to their expectations.
Main key is to realize how important your first jobs are to your future success and put a lot of effort into finding the best opportunities possible.
Good luck!
(And yeah, likely have more rejections, but I automated generating custom resumes, submissions, etc. for some research on how resumes work.)