there's not a lot of Force sensitivities in the galaxy at this moment - Grogu, Luke, Ahsoka, kal kestis, some random others
it's probably going to be fairly easy for Luke to get a bead on grogu
Pretty much. And remember, Grogu reached out to Luke before he was captured by Moff Gideon. So Luke would have had plenty of time to get underway and fly to Grogu's location.