Erica, First thing's first. You are not old at all.
And certainly not too old to start nursing school
Second thing. The counselor you spoke to is on psychodelics with emphasis on "psycho."
I can only guess that her intentions are not honorable by steering towards the MA instead of a licensed LPN or RN tract.
I will assume you are talking to a for-profit school advisor who sees in you a way to string you along to pilfer whatever post 911 GI benefits they can get their hands on. This is typical as the for-profits are incentivized to do so.
The best most cost effective and benefit preserving route to go is to go to a community college and take the prerequisite courses towards becoming an RN. See how you do, take your time and have patience.
And never listen to some crook who tells you you'd be better off as a non-lincensed MA so you can get "experience."
Vets, don't let these people rob you of your valuable GI benefits because if you do they will gladly accommodate you.
The for-profits have proven to be no friends of the military. Do a internet search on the subject and you might be quite taken aback to say the least.