Indoor grows take some time getting stuff bought and set up, but after that run with little input unless you fuck up and are constantly dealing with problems. I check on mine as soon as I get up to make sure everything is running and check soil moisture. 3 minutes tops if I have to water. Tuck them in bed at night, maybe a couple minutes.
My outdoor grows could be ridiculously easy during summers with sufficient rain.
You can make it as hard or simple as you want, it's up to you. Give em good soil to start with, poke some seeds in, water properly, feed em a few times, is all it really takes. If you like screwing around with a lot of arcane details, and worrying about and trying to fix every little leaf spot go ahead, enjoy yourself. The more you micro-manage and screw with them though, the greater your chance to screw something up. Plants don't need fretting over, they really prefer to be left alone.
