Yeah, that sounds about right. Buy a gravel vacuum (not expensive) and a new five-gallon bucket. Do 25 percent water changes about every two weeks. The gravel vacuum will clean your gravel and remove water at the same time. I'd clean the filter only once a month, though. Do it on one of the weeks that you're not changing the water.
You should either match the temp of the water going in or let it sit and get to room temp before adding it to the tank. And don't forget dechlorinator -- Prime is a good one that also removes Chloramine.
You should either match the temp of the water going in or let it sit and get to room temp before adding it to the tank. And don't forget dechlorinator -- Prime is a good one that also removes Chloramine.

