I'm arriving into Munich at about 10 am on Thursday May 16th. We are a group of three: myself (age 41), and my parents (age 70), who are physically very capable but my father has to walk pretty slowly for various reasons. We are taking the train directly to Nuremberg that day. I'm going to wait to buy our tickets until we arrive and clear immigration/etc. I'm planning to buy the tickets from the DB machines in the airport. I've done a lot of reading on German train travel and looked through prior posts but I do still have a question:
I know we take the S-bahn to Munich Hbf and then we want to take a high speed train to Nuremberg from there. (I know the regional trains are cheaper but I want to get there faster and be able to reserve seats for us.) Should/can I buy both tickets together from the machines as a single ticket? I'm worried about having enough transfer time once we are at Munich Hbf. Do the machines allow you to modify the connection time like the bahn.de website does? Or should I buy a separate s-bahn ticket and then use the DB app on my phone (or use the machines) to separately choose the train to nuremberg that we want?
I am going to purchase some other tickets ahead for our trip so I will have a DB account but I don't want to have to rely on the DB app immediately upon arrival to do the purchase while also getting my bearings. I have navigated other European train systems previously but this is my first time to Germany. Any suggestions are much appreciated. Thank you.