Local Trains + Baggage

I am curious about taking the local train from Osaka to Kyoto. We are staying in The Royal Park Hotel Iconic Osaka-Midosuji and The Royal Park Hotel Kyōto Umekōji. Do we book seats if we all have luggage? What stations do we go to and do we book tickets at the station for the local trains? What is the go? Thanks.

by ButterflyUnusual9213