Hi from Lancashire
OK, you need a tripod (as suggested) a remote cable release (£5 off eBay) and two filters, a polarizer and a neutral density filter. The cable release isn't urgent but they are cheap and means the tripod doesn't shake when you push the button. The polarizer is something everyone should have. It removes reflections and makes colours pop. Make sure you get a decent one. Hoya are pretty good and cost from £10-£30 on eBay. The ND filter isn't totally necessary but is handy. Its effectively sunglasses for your lens. One great source of information is YouTube. Have a look at photography tutorials by a chap called Dave Browne. I have learned loads from his videos
good luck and don't ever be afraid to ask anything.