The 18-year-old was Solskjaer's final signing on deadline day as he joined United for £10million from Penarol on a five-year-deal.
Solskjaer told MUFC.com: "He's a young boy coming from Uruguay.
"He's a signing in the tradition of what we do here which is to bring young players in and let them grow and develop and become the player they can be.
"Of course we'll give him time. He's more one for the future than now, but he's exciting and he's shown some things in training that we don't really have here.
"I'm looking forward to helping him develop and helping him settle."