I understand, but I'm not talented enough to get the timing right. I'd have to practice for hours and hours and hours.
Nah. I have faith in you based on our non-existent digital interactions. If you can walk, you can swell with a volume pedal. Trick is to start the pedal movement before the note. Also you can try it both standing and sitting to see what's more natural. Volume pedals are so useful even if you don't use them for swells. Even better, you can get a wah/volume combo pedal if you like analog or a multi-fx with an expression pedal if you like digital and use either one for more than one thing.