I have taken training, been mentored, have used those skills in employment, and I now mentor other people. I would highly recommend that anybody who is seriously interested in wilderness survival and bushcraft, consider getting some training from a pro, or someone very experienced.
Even with the experience I have, I still turn to others who's knowledge is greater than my own in some areas. Nobody can know everything.
I would however "audit" the course content and make sure it is not a rehash of what you already know. Compare it to some of the bigger schools in Britain and the US. They can be very costly - especially multi-day courses, and some so-called instructors are simply regurgitating what they have read themselves.
You will see a trend where courses will offer all kinds of crafts and skills that are centered around wood and plant species that don't even exist in your area. I would avoid these guys as they are the regurgitators and likely are not qualified to teach others to think outside the box and be creative.
Talk to your local guides and outfitters, and even S.A.R. and see if they can steer you in the right direction.
So, yes - get some training, but be wary of who is doing the training and what they are teaching.