All indications are that an independent Scotland will be way, way more Socialist than present day Great Britain.
With only 5 million people, and an average age that appears to be north of 45, staffing that military will not be an easy chore.
I suspect that they would have to go with the Swiss model. Rifle in every home, every male required to receive military training. Could be set up and executed within a couple of years. Hard to do overnight but very effective to prevent the country from being attacked.
They could make it compulsory as part of the education system. Similar to our JROTC program in High School. Learn to march, basic military ranks, general orders, basic first aid, basic military squad level tactics and basic rifle marksmanship in a 1 school year program.
BTW, this is something that I think we should be doing.
It’s funny to watch the Scots and the Welsh have two completely different reactions to independence. Scots get their kilts all bunched up and have no clue that they are about to have to pay for a helluva lot more than they do now...the Welsh took exactly ten seconds to realize what independence meant in fiscal terms and don’t even consider it outside of hardcore nationalist corners of society.