Being an EMT-B looking to enlist in the military question on age and being a paramedic?

Hi, I graduated college awhile back. I have looked into officer programs, but have no desire to be an officer. However, I will not rule it out can always go into reserve eight years later. I have been applying to jobs in my degree field, but no answers yet. Reasoning behind joining the military is I want to be part of a bigger picture, see the world, and just acquire skills. I would want to continue towards a master’s degree while serving. I have been an EMS volunteer for 6 months and taking a class for advanced EMT right now, you are allowed to do IV’s only difference in our state. Question is I am 24 and will be 25 on average are there allot of people enlisting over 25 years old? Second question can you become a paramedic down the road in the military? Third question I took the practice ASVAB online did all right except in the areas of mathematics and arithmetic. I am sure that will be important in scores for enlisting in the medical field. Would they give preference to anyone already an EMT or a paramedic into entering? On the other hand, you get the scores to obtain the job you want. I will have to bring out the old math book. I am going for enlisting as a medic, but open to other options as well.