Yes, that would be no problem at all Belle . All you need to do is choose a song to represent Sweden, and then when the registration period is closed and all songs have been posted, you listen to all and decide which songs to award your points to. You get plenty of time to listen to all the songs and when you are happy to vote, you post the votes in a private message to the host vini. The dates for each phase is located in the first post of this thread if you are unsure of when everything happens.
And then it is no problem if you are absent during the live show because if you cannot be here to deliver the votes yourself, the host vini will be able to post them on thread when the time comes . It is quite a regular thing too, many jury members are unable to deliver their votes so it is not a problem. So you and Sweden are very much welcome to participate