I have a carbon fibre and silver Caran D'Arche. It cost me GB£ 500 seven years ago, and I use it daily. It, and my watch (a Breitling Navitimer) are the only things I've ever bought where I was able to perfectly balance utility, quality and aesthetics, and hence didn't care less about the cost.
The point is that what works for one person doesn't necessarily work for another.
There are whole networks of fountain pen afficionatos with reviews, writing samples, etc for pens, paper, and inks. It's amazing. However, if you're starting out, I recommend getting a cheap pen and then move up if you feel the need.
The cheap Pilot Varsity disposable ones are a fantastic starter FP, as they cost about $3, a tenth (or less) of the price of a Good Fountain Pen. Ink isn't changeable, but the leaking is minimal. (They aren't waterproof, though.)
The advantage is, if you decide you don't like it, you aren't stuck with it, and if you lose it or loan it out, no big deal. I also like that Staples tends to sell them in a pack of three colors.
I've also used the Bic one [1]. It's also OK, and is partially waterproof, but its cap drives me bonkers. It's been a long time since I used one, though, as the pads at current employer bleed a bit when I used my fountain pens. I liked writing on the sugarcane spiral bound pads from Staples because they were so smooth.
can you go to a stationary store or art supplies that deals in Waterman, Cross, Mont Blanc etc and try a bunch. Mostly they have gold nibs which make the ink flow really nicely, but they all balance and fit your hand differently, and after a while, the nib softens to how you write
