I mean you are going to regret because there won't be any game you want to buy.
Mario and Zelda is possibly the 2 top game on Switch lifetime.
Most anticipated games will be Pokemon/Monster hunter/animal crossing  (super lengthy game)

Splatoon 2 and Arms are casual game yes but they are also online games, unless you happen to have a lot of data to spend, handheld online is not the best way. As for indie games, a lot of them are not coming to Switch, might as well play it on a laptop.
You have a PC or something? Or just totally uninterested in today's game except for Nintendo games?

Played my first online match. Got smoked and end up last place, haha. Need to brush up my skills