I don't find you very inconhereant, in fact you are very clear for someone such as yourself. We've certainly had far far worse here once or twice!
If you think we are misguiding you, please don't. We are only concerned that you realy understand what the realities are in the UK.
It's not to put you off, or misguide you, in fact it's the opposite. We want to make sure you really understand properly, before you commit yourself.
Toddy lives in Scotland, and is a real scot, so take her advice seriously, as she has a lifetime of experience and two sons. So she realy knows the score.
Tengu has offered you to visit her in the summer, and she will help you for sure. You would probably like it there and learn a lot.
You say you have a job planned, make sure you have somewhere to live too, apartments are not cheap and everyone is fighting for them, they are overpriced too.
Thing is, Scotland is the place most people dream of getting away from it all, and londoners( and others are flocking there, with wads of cash in their pockets from selling their London homes, which are far more expensive than Scottish ones, and pricing local people out of even the rental market.
To own a gun, you have to have a permanent address, and a gun locker. Which would not be possible living wild, unless you had many thousands of pounds to buy your own home, (£20.000, won't be enough for sure) whether that be a croft or not. Sadly
I think it won't be quite as simple as you believe.
Laws change all the time, and even some areas that allowed wild camping before covid are now cracking down on wild camping, and rv camping.
If it was as easy as you imagine many more of us would be doing it for sure.
That's not to try putting you off, but only to make sure you understand the task you have set yourself in it's fullness.
It's actualy easier to go to Bali and live like you want than Scotland!