Colts star tight end Mo Alie-Cox says the blueprint for Tim Tebow's success at his new position is simple ... telling TMZ Sports all the new Jaguar has to do is just be open to learning.

"The tight end position, you have to learn how to block," Alie-Cox said.

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"You have to catch passes. The protection -- the little things like that. So, it's a lot that goes into it. It's a lot of mental."

Alie-Cox, though, says he's pretty sure Tim's going to be just fine ... despite never playing the position and despite being out of the NFL for nearly a decade.