Got one of these for Christmas for my son....and for myself...lol. I have to say...I'm not a big Nintendo person.Didnt really care for the gamecube or the Wii, but I will say I am enjoying this console. Really like Super Mario Odyssey....really reminds of Mario 64. Downloaded Fortnite....how does it play on this compared to the XBox?
First off, congrats on getting a Switch. We love ours and play it all the time!
Second, I would highly recommend investing in a Pro controller. Especially for you, as it's just more comfortable for adult hands. It's a bit pricey, but well worth it.
Regarding Fortnite, it runs just fine on Switch but there are a few concessions that had to be made. The biggest is it doesnt include the "Save The World" single player mode on Switch. Only the Battle Royale mode can be played on Switch. Also it runs at half the framerate compared to the Xbox/PS4 versions (30fps instead of 60fps). But even at half the framerate it plays just fine. Infact, we have it on both Switch and PS4 and my 8 year old prefers the Switch version due to the portability feature.
You already have Odyssey, which is 1 of 4 games I would consider must owns for the console. Here are the other 3 you really should make your next purchases...
1.) Zelda Breath of the Wild - Simply put, a fantastic action/adventure game that is one of the best in the series! But be warned, the game is massive!
2.) Mario Kart 8 Deluxe- Best couch multiplayer game on the system! It's so much fun and it has a ton of content!
3.) Super Smash Brothers Ultimate- This game is a blast! Especially multiplayer and there is a ton of fighters to unlock. The most ever in a Smash Bros game!
Other games to consider on Switch...
Fast RMX - Spiritual successor to FZero and can be bought dirt cheap on the Nintendo store. A fun, fast, futuristic hover racing game! Its crushingly hard, but fun!
Mario + Rabbids Kingdom Battle- Great "XCom" style strategy game featuring Nintendo characters! I bought this one on recommendation, not expecting much but I had a blast with it.
Starlink: Battle For Atlas- A great little space combat game, but what makes the Switch version the must own version is it comes with an exclusive Star Fox mission and you can play as Star Fox the entire game. It's basically the Star Fox game fans have been asking for, for years. Only it took Ubisoft to deliver it instead of Nintendo.
Xenoblade Chronicles 2- If Japanese RPG's are your thing, you'll love this game, and its massive!
Splatoon 2- A fun and unique take on the shooter genre, using paintball instead of real weapons. This is one of my son's favorites, especially multiplayer.
Pokemon: Let's Go Pikachu/Evee- Not the biggest Pokemon fan but my son loves it.
Captain Toads Treasure Tracker- A fun puzzle solving game!
Donkey Kong Tropical Freeze- One of the best 2D sidescrolling platformers ever made!
Bayonetta 2- Fun arcadey 3rd persion action game.
Whew! I know that's a ton of info but it should give you a good idea of what to look for next to play.