Osaka

Hi, I was deciding between booking hotel at Namba or near Osaka station.
basically, i have luggage and old folks, hence would like to avoid changing train and even the platform.
I will be travelling from - Osaka Kansai Airport > Osaka > Tokyo > Kyoto > Osaka > Osaka Kansai Airport

I would ideally want to stay in Namba station area since that is near Dotonburi. However, i am not sure if the JR Shinkansen from AIrport to Osaka as well as the return train from Kyoto to Osaka will stop directly at JR Namba station OR i will have to stop at Osaka Station to change platform to the JR Namba station? If i have to change, then i will just get a hotel at Osaka station to avoid having to carry all the luggage to change train/platform.