Hi and welcome to AA! From what I've read, you can never have too big a tank to start with (as long as you have the physical space), so just keep that in mind.
For filters, there are a lot to choose from. The AquaClear filters are good I think. You just want to be sure they're the right size for your tank. You can always have more than one filter running on a tank too, extra filtration is never a bad thing.
As far as cleaning, the only maintenance really is weekly water changes. You don't want to fully replace your filters b/c then you'll lose any beneficial bacteria you have on them. You'd just swish the filter media in OLD tank water during a water change every couple of weeks to clean them off. You should also vacuum your gravel (or sand) every couple of weeks too.
How are you planning to cycle your tank? You need to cycle it, preferably before adding fish (otherwise, with fish, you'll be doing a lot of daily water changes and water testing and potentially could lose fish). There's a link in my signature below (the one that reads 'new empty tank..'). Give it a read and see what you think. You'll need a bottle of pure ammonia and a good liquid test kit like the API Master Kit (you'll need this too once you have fish anyway). Good luck!