Ballpoint pens use a viscous ink that, like graphite in a pencil, needs pressure to be applied. Rollerballs and fountain pens both use low-viscosity inks that flow simply from being touched to the paper.
The latter requires much less effort to write (no constant pressure) and enables writing with the hand held mostly still, using the larger muscles of the upper arm and shoulder to create the letters. The downside is that they can create impressively large ink blots on your clothing if uncapped/unretracted, and the ink can be smeared if you touch it while wet. But pretty much every writing system still out there in use (i.e., not cuneiform or runes) was designed with a quill or brush as the instrument.
Your style might have to change a bit, but disconnected letters were quite common in medieval Roman-style scripts, which were definitely written with quills.
> that flow simply from being touched to the paper
Or just by itself if you bring it with you on a plane :)
This looks like a perfect rabbit hole I'd be wise to avoid. At least I have a good excuse of being left handed since I would be constantly smearing all the wet ink.
Although it's not a beginner fountain pen in terms of cost (though it is not too expensive, basic models around $160), the Pilot/Namiki Vanishing Point is a retractable fountain pen that does not leak when retracted.
The cartridges for it can, of course, get expensive, but a 1 mL syringe and a big bottle of ink (even Mont Blanc ink is only $25 for 60 mL) will let you refill them cheaply.
I made the original suggestion explicitly to avoid the rabbitholes.
I use a Pelikan Jazz (20$) and a bucket of black cartidriges (100 pieces) I got off amazon for like 8$ (like two years ago).
I got a kaweco fountain pen a few months ago and i honestly regret spending those money, it's a shitty pen, some of the most dumbly-wasted money of my life.
I got one because my wife, who actually is an aficionado, suggested that it would be a good one to carry with me (and it is) due to the non-leak. I would carry it more except that we have some forms at work that are duplicates, requiring pressure, so it's useless for that. A Pilot Precise V5 RT retractable rollerball is nearly as good and cheap (in small quantities, $2-3 apiece).
The latter requires much less effort to write (no constant pressure) and enables writing with the hand held mostly still, using the larger muscles of the upper arm and shoulder to create the letters. The downside is that they can create impressively large ink blots on your clothing if uncapped/unretracted, and the ink can be smeared if you touch it while wet. But pretty much every writing system still out there in use (i.e., not cuneiform or runes) was designed with a quill or brush as the instrument.