Kat, the subjunctive is falling into such disuse that it's my understanding that it is generally considered acceptable to not use it at all. Mind you, I haven't done a tour of the authoritative sources, so take that for what it's worth.
If I understand your sentence correctly, your character is feeling obliged to love soccer because he/she is going to be forced to practice it every day. If that's the situation, the subjunctive wouldn't be appropriate, because it is going to happen. He/she IS going to work at soccer every day.
Wayne and Shuster did a delightful little comedy sketch in which a bum on the street is singing "If I was a rich man". A fellow taps him on the shoulder and says, "Excuse me, shouldn't that be if I WERE a rich man?" The bum replies in his snootiest tones, "Well, EXCUSE me. If I WERE a rich man, I would USE the subjunctive!" That song is a great example of where the subjunctive is appropriate - the singer is not rich and is fantasizing. The subjunctive is described as the mood of doubt, to be used when the reality of a situation is doubtful at best, and often not even that.
Hope this helps a bit.