The printer doesn’t need much maintenance. Unlike inkjet printers, there’s no risk of clogging if you don’t use the printer for a long time. Additionally, the toner cartridges last a long time, so you won’t need to replace them often. If you experience print quality issues, there are a few built-in functions to help resolve them, like Toner Calibration and Toner Registration (which helps remove fringes around colored areas).
You can access the toner cartridges by opening the front cover and pulling out the tray. Paper jams are accessible through a large panel on the back of the printer. You can also access paper jams through the front; you just need to remove the toner cartridges, the waste toner box, and the belt first. Brother specifies that the waste toner box (WT-320CL) and belt (BU330-CL) are good for 50,000 prints, while the drum (DR431-CL) is good for 30,000 prints. The input trays (main tray + multi-purpose tray) hold 300 sheets of paper, which is a fair amount, so you likely won’t need to refill it often unless you print a lot.
You can download the user manuals here.