I also learned how to juggle as a kid and practice enough to remember how, but not enough to get better. I can do cascade/reverse, shower, half-shower, and some easier-than-it-looks tricks like eating an apple.
Depending on your dexterity and aptitudes, 3-4 weeks of practicing for 20 minutes a day should get you able to juggle three objects as long as you want. It's hard to watch TV while practicing, but you should be able to listen to music or a podcast.
Beanbags are the easiest thing to learn with. I use fancy nice ones from Todd Smith, but a set of cheap ones for $5-$8 will serve you just fine.