You need a paid membership to Nintendo Switch Online to play course world in Super Mario Maker 2. Pretty sure you could access course world at no extra cost in the original
Super Mario Maker 2 (SWITCH) cheap - Price of $34.33
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/cdn.vox-cdn.com/uploads/chorus_asset/file/16677302/Switch_SuperMarioMaker_ND0515_screen_16.jpg "Super Mario Maker 2 review: a great sequel that makes me miss the Wii U - The Verge")
Super Mario Maker 2 review: a great sequel that makes me miss the Wii U - The Verge
Super Mario Maker 2 + New Super Mario Bros. U Deluxe - Two Game Bundle - Nintendo Switch : Video Games - Amazon.com
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/cdn.vox-cdn.com/uploads/chorus_asset/file/13757524/vlcsnap_2019_02_13_17h01m09s214.jpg "Super Mario Maker 2 comes to Nintendo Switch in June - Polygon")