I know this is coming very late, but my $0.02 (0.0003 euro? :-) in the hopes it may be helpful:
Experience and attitude will trump these certifications any time. If you project a passionate and positive attitude, you will learn, and be invited to learn more from those with more experience. The most important thing is probably to taste as much wine as possible ("taste like a banshee" as one wine maker once told me :-).
The certifications - CSW and WSET - can then help establish additional credibility, not to mention be a fantastic resource for learning more about all aspects of wine. I found the WSET and CSW exams fun, in an odd sort of way, for that vary reason - I was learning more :-).
People that I know in the wine industry in sales, distribution, and as restaurant wine directors, see these certifications as being helpful to their career progression in the industry.
Hope that helps!