Looking for advice from current/former officers

Recently, I was accepted for OCS. I will be leaving for BASIC almost immediately after I graduate. While I am excited at the prospect, I am also nervous now that the reality has set in. And now I am looking for advice from those who have previously been in my situation.

Firstly, I do not plan on making a career out of the military. Serving my country is something I have always felt the need to do. It just felt right to me. So I applied for OCS in my last year of college to make sure I will never be one of those, “I almost served but——“ guys. Regardless, as of this moment I don’t plan on staying in past O-3.

Second, I am at a crossroads for what I want to do in the Army, and how it will play out in civilian life. I would like to state that I am aware I will be competing for my MOS upon reaching OCS, but I am fairly confident that I’ll be a strong enough applicant to choose what I want to do.

I have a strong desire to be an Infantry Officer, it’s something I’ve wanted to do for a while. At the same time, I am worried about having no transferable skills upon getting out. My second and third choices would be MI and Logistics. I do have a STEM degree from a fairly decent school. Due to this, I believe in combination with experience in intelligence or logistics, I would be setting myself up for success on the civilian side. However, I can’t shake the feeling that I would always be regretful of not going infantry. Of not testing myself with the best of them at Ranger School and not leading a platoon.

I guess I’m just looking for advice from those whom have been here, and what they would tell me or their younger self about this decision. Another thing that I am wondering about is the social aspect of being an LT. How is the work-life balance of those three roles? Are you more likely to be stationed at good bases with one vs the others? Tying in to that, I have read that many find life as a single officer to be lonely. I can deal with long hours and hard weeks. For months and years even. That’s a sacrifice I can make in order to serve. But I am someone who seeks companionship from others and likes having friends and a significant other to lean on and lean on me if needed. Is friendship really that hard to come by as a junior officer with others only looking out for good rates and poor dating pools?

Sorry about the long post, just wanted to get my thoughts out there and seek advice from those whom have been here before.