Nintendo Switch is great for 1st party games and some exclusives, but frame rate / resolution might not be able to compete with other consoles, plus the MSRP of many games on e-shop can be 1 - 3 bucks more expensive compared to, say PSN.
If this is your only gaming device, then maybe consider Crisis Core, Hollow Knight, Octopath Traveler 2, Live a Live. If it’s not, then stick to 1st party games, exclusives, and graphically less taxing games.
As for discounts, I use DekuDeals to keep track of the price drops. Most 1st party Nintendo games only have discount up to 33%, and those discounts happen like 2 - 3 times a year. While 3rd party games… I swear to god I’ve seen games that are on sale every month or so.