I did not serve although my dad did as did almost every male surounding me did as a youth 30+ years ago. When I brought up joining my dad and almost every person be it family and dad friends said do not. Basically my dad talked me out of joining and told me if your called upon to defend our shores then so be it. up until then I erge you not to enlist? I didnt dwell on it much after that. My Great uncle also said you do not need to sign your life and freedom off to be a proud american.
Nearly identical situation for me. Though Dad signed up to be a Marine pilot in Vietnam and re-upped a couple times, he suggested I do not follow the military route. I went for it anyway, which he supported, but I ended up getting bounced on medical for a cardio issue that was discovered in a pilot physical. Years later I was told by others he was pleased I ended up doing the corporate thing. Go figure, nearly all of our family friends were current or former mil pilots.
Dad was also a competitive shooter in his younger days, so that helped as far as getting good instruction. In the last ~2-1/2 years I have not lost a rifle nor pistol competition at my club. I did get 2nd in a blackpowder shoot . I'm catching some mostly good natured crap from members, and I have my dad to thank for this. As mac1911 knows, I have a long way to go in JC Garand matches, but I hope to medal some day soon. Camp Perry is on my bucket list.