No, you manage everything from your Vita screen, either with PS3 or PC, that's the way it works now. you can't even buy and download games from PC because there's no software for it. maybe in the future SOny will make a dedicated software like Media Go. they have to know that it's kinda crazy that people need to use either Vita or PS3 to buy digital games, and you can't even have background download while playing another game if you download stuff on Vita. the network function is disabled during games playing.
I think I read someone said about 1 or 2 seconds difference
go to setting >system>system restore
then it will ask if you want to format memory card, you don't need to format it at all. after a very quick restore, Vita restart itself and you have to enter language, date, wifi info and psn account. after that's done, the intro video will be played, can't be skipped so you have to let it run for a few minutes, then you go to your Vita main screen. any content on your memory card like games will be displayed, even games that are registered to different account is displayed, you just can't play them.
it's very simple and quick other than that unskippable intro video.