Sure:

-Moshix YT channel is pretty nice:

https://www.youtube.com/channel/UCR1ajTWGiUtiAv8X-hpBY7w

-And here some documentation and the MVS distribution:

http://wotho.ethz.ch/tk4-/

-AND the fantastic bit-savers...enough reading material for a lifetime

https://bitsavers.computerhistory.org/pdf/ibm/370/

https://bitsavers.computerhistory.org/pdf/ibm/390/

I wish you lots of fun, and thanks for saving some history ;)