A:Answer99% will be compatible yes. The only games that you’ll have trouble playing are the joy con only games. Mario party, switch 1-2 are the only ones I can think of. There might be a couple other. But just check the back of boxes. If it says handheld compatible, you’re good to go.
A:AnswerWell first you would need to make sure you have a micro SD card that will be able to download all of the memory for fortnite then make sure your on a good WiFi connection
A:AnswerSo yes but is better to buy the home switch because if you buy the lite version is a little bit different for different types of games only for that version so you can play every Mario game and everything like that but is better buy the home version because too you can play with two people and the lite is with one.