As a matter of fact there is some plants which required little maintenance like fern and moss.

For starter which I did few years back, I started it out with driftwood and java moss tying around it. Maintain the water temperature using a DIY Fan (basically the fan is on 24 hour), providing CO2 using via DIY as well (just started so I don't have enough saving to get a CO2 cylinder and regulator) and adequate lighting (use a timer and set it to max 8 hour) to let it grow. Withing 1 month, you can see the result. During that 1 month period, all I did was top up the water every 2 ~3 days depending how much water was aerated and add liquid fertilizer every 2 days (3x a week).

So basically very little maintenance is it?? Hope you have fun