I think people over-complicate fountain pens a lot.
I have a Lamy Safari that I got in 2012 and works just as well today.
It's what I still recommend to anyone who asks what to get.
Just get the pen, with its cartridge, add more cartridges -- you can stay here and already you're way better than with most standard ball pens that you'd be using otherwise.
Then, get the small converter, plop it in, get your first bottle of ink -- and again you can stay here and enjoy your pen-and-ink experience for a long long time.
Now if you want to try a few different inks, do that next. Maybe get a second pen, see whether 'fine' or 'medium' sized nibs is more your thing.
Go further than that if you want, but you don't have to.
Either way, that first step is enough to improve your life a lot
I have a Lamy Safari that I got in 2012 and works just as well today.
It's what I still recommend to anyone who asks what to get.
Just get the pen, with its cartridge, add more cartridges -- you can stay here and already you're way better than with most standard ball pens that you'd be using otherwise.
Then, get the small converter, plop it in, get your first bottle of ink -- and again you can stay here and enjoy your pen-and-ink experience for a long long time.
Now if you want to try a few different inks, do that next. Maybe get a second pen, see whether 'fine' or 'medium' sized nibs is more your thing.
Go further than that if you want, but you don't have to.
Either way, that first step is enough to improve your life a lot