Army Reserve Vs. National Guard (Advice)?

Sorry if this is long:

I originally talked with a Army recruiter and he got me through the ASVAB and so forth and getting ready to go to MEPS when I moved and transferred to a college. Joined ROTC and was given the option of going to LTC (Leader's Training Course) this summer to count as my basic (Since apparently it does now). The choice I have to make is whether to go National Guard or Army Reserve. Honestly I lean more towards the Reserve.

Now for the details:

I want an MOS of journalism, photojournalism, Public Relations, combat documentary, or anything along those lines. I was told through ROTC that they could guarantee me a MOS in what I want through the Guard, and that it would be harder to get said MOS in the Reserves.

Depending on how my time in service goes, I want to consider going carrier or at least longer than the 8 year commitment.

My Questions:

Do many people make go carrier in the Guard?

Which choice am I more likely to get the MOS I want?

Which choice am I more likely to get more opportunities with? (like Airborne school, or special units?)

Which choice is going to allow me to relocate a little bit more easier?

In closing:

I picked the military NOT because I'm looking for someone to pay for the rest of my education. I picked the military because I feel called to this line of work. I want to put my all into it, not just go for the benefits or side money. At this time in my life I want to give it my all.

Thank you in advance.