long time lurker first post lol i wanna play online multiplayer on my original Switch, but I keep getting this:

Can't connect to the server.
The server may be busy, or your network connection
may have been lost. Try again later.
Connection test: Internet Failed
Im on a moible hotspot. My phone and laptop work fine. The console says its connected to the internet in the settings, but as soon as i try to actually go online, it fails. Im missing out on game nights with friends. What should i check?
Game night is in two days, and I realy dont want to be the one who cant join lol Any ideas are welcome, even basic ones.