Oliveira joined Forest on loan from Benfica on transfer deadline day, but it has taken him a while to adjust to his role at the City Ground.
Freedman is predicting big things of the Portuguese international in the future, though, and is working hard on the training field to get the striker up to speed.
“He’s a fantastic fella, he really is, and one of the hardest-working players on the training ground," the Scottish boss said.
“He doesn’t always understand what’s required so you’ve got to be a little bit more patient, and I don’t think he’s fully settled in – I think he’s still got to adapt to the pace of the game. But he’s certainly working at it on the training ground.
“I think he needs a home. I’ve watched him for a number of years and I think he’s had too much too soon. Expectations of him are very, very high. But we’re getting to know Nelson and we’re working a lot on finishing.
“As long as he turns up with the right attitude and spirit, there’s no doubt in my mind he’ll be scoring goals for this football club very soon.”
Oliveira has made two appearances for the Reds so far, and he is already off the mark for the season, having scored against Queens Park Rangers.
That goal should give the 24-year-old confidence that he can have a productive season in England's second tier and revive his career, which has faltered in recent times.
As a youngster, there were huge hopes for Oliveira's future, but he has struggled to make an impact during loan spells at Rennes and Swansea City of late.
Forest will be hoping to get the best out of him, though, and it seems that the striker will have a big part to play in their season, once he fully acclimatises to his new surroundings.