Hi wullemaha,
not that I have tons of practical experience, but I've been preparing for a wedding-photography career in theory for years
So maybe that counts.
You have a decent selection of lenses, but I'm afraid you might miss some shots because of the lack of fast zooms. Personally, I think a person can shoot the entire wedding with a 16-50 (or 17-50) f2.8 and a 50-135 (or 50-150, or 70-200) f2.8 lenses, if they don't have anything else. You also have fast and wide primes, which is very good for adding variety to your pictures (if there's any time to do it), but if you'll be shooting also in the church, or when it starts getting dark in that garden, you'll need as much light as possible - and there's a 2-stop difference between f2.8 and 5.6, so your current zooms won't make it easier for you and your flashes.
I think if you tried to shoot the whole thing with primes only, there will be times when you wish you had a zoom lens on your camera. But you can try!
And I know you're probably asking for advice on equipment only, but there are also other aspects as important as equipment. You still have more than one year until the wedding, which is enough time to digest the information regarding shooting techniques, and practising those techniques. I don't know if I can post names here on the forum (if I can't, then admin please, delete just the names, not my whole post), but if you can, try watching some videos with Joe Buissink. Joe is an awarded wedding photographer and he did some workshops for Creative Live, for example. They're lengthy, but if you watch them, you may begin to understand how he thinks during a shoot, what he observes, what he focuses on etc. And his style is mostly photojournalistic, which is what your friends require from you as well. Also Dennis Reggie is a pure photojournalist, but I'm not sure whether he did any workshops or not. So if you don't find any videos of him, you can at least learn from his photographs, on his website.
And I know how it is when people confuse your country with some other. I'm from Slovakia
Some people will even say they thought "Slovakia" and "Slovenia" is the same country, just a different spelling