Are you worried because he isn't eating much? Or because he wont use a spoon?

I wouldn't worry about him eating much at 12 months, he is still very little, and if he was BF till 3 weeks ago then that is ok. When they are BF food under 1 is just for fun. As they get older then it becomes something that they should get more into.

As for a spoon, who cares?? Just let him have it, offer a spoon, if he doesn't use it don't stress! It's much more fun with fingers