Populate multiple text boxes based upon dropdown list selection in SharePoint 2013 on prem

I have 1 main list called OnCallEscalationContacts. This list has fields such as - TechnologyTeam[dropdown], FirstContact [people picker], FirstContactPhone [text field], SecondContact [people picker], SecondContactPhone[text field]

I have second list called OnCall which has fields such as - TechnologyTeam [dropdown],FirstContact [people picker], FirstContactPhone [text field], SecondContact [people picker], SecondContactPhone [text field].

When user picks an item from OnCall > TechnologyTeam the remaining fields in OnCall should be pre-populated from corresponding fields from OnCallEscalationContacts fields.

How do I accomplish this? I am open to using KnockoutJS or any other JS framework if possible

Thanks Snehal H.Rana SharePoint Consultant