Your posts to date have all been variations or side explorations on this theme, such as
Thread 'Which branch should I consider for this?'
https://www.serviceacademyforums.co...hich-branch-should-i-consider-for-this.92170/
There is nothing wrong with seeking opinions and insights into military career paths from sources like this. You have received several replies across various threads, been given some links to explore, and been urged to go to primary sources to research and talk to actual officer recruiters for the Army Reserve, Navy Reserve and Air Force Reserve. You need to find out, first and foremost, what officer specialties are available to you if you commission directly into the Reserve. You may find cyber is not available, that a service prefers their cyber officers to have AD time first, then go into the Reserve when they leave AD.
This is an unofficial, anonymous Internet forum where advice is worth exactly what you pay for it, including mine.
There are no guarantees. It’s time to research every official source online, develop your list of thoughtful questions and find the right Reserve officer recruiter to talk to, taking detailed notes, doing a comparative analysis, making an adult decision.
Do the work.
Some more links…
https://www.navy.com/careers/cyber-warfare-engineer (read everything, including “part-time”)
Focus on the Direct Commission section.