Zero.
aaaaah man.
I don't really want to try the Feathers as from what I have read they are deadly sharp and I'm very new to using DE blades.
My first DE shave was with a feather. Don't worry too much.
And why not give the Merkur a try first....they might just "do it" for you.
Hmmmm.
When looking for Derby razors do I want Derby or Derby Extra?
Thanks.
I think Merkur blades, while not my personal favorite, are perfectly capable, it's just that many guys who didn't know how to shave properly yet started with Merkur blades and blamed their initial bad shaves on the blade.
As you've read here many times, YMMV (Your mileage may vary). Some people swear by a particular blade while many others swear AT it. You can find as many detractors for a blade as supporters. I've hated a blade, gone back to it several months later, and liked it. The time of year (winter/summer) may have some effect.
The encouraging part is that after a few months of trying different blades (assuming you go with a sampler pack, which is highly recommended), you'll begin to figure out what works for you, so that you can still experiment some, but know that you have a fallback best blade when you need it. Luckily there are lots of different brands to fiddle with!