Fallout 76 is coming out on 14th of November, but if you're really, really interested in getting to play the game before that, we've got good news for you, because an official beta is going to be taking place soon.
The B.E.T.A. (Break-It Early Test Application)'s primary purpose will be for the players to stress-test the servers and make an attempt at breaking the game. This is why Bethesda has a special running schedule for the Fallout 76 Beta that you're going to have to work around.
According to Bethesda, "on any given day the game might be up for anywhere between four to eight hours. Focusing as many players as we can into these windows is our prime objective." What this means, in essence, is that you won't be able to play Fallout 76 whenever you want to play, but when Bethesda opens up the servers for you to do so.
In any case, should the stress-testing occur in four to eight-hour intervals, that ought to give you plenty of time to work some playtime into your schedule. The official Beta is set to kickstart on PC on 30th of October, so there's some time for you to steel yourselves yet.
This sort of aggressive stress-testing will be taking place all the way up until Fallout 76 launches, and Bethesda promise to keep us in the loop on virtually all of their official channels. In the meantime, read up on how to actually join the beta in the first place.