Here is a freely downloadable compendium of “getting started” articles written by Keith Baker, KB1SF/VA3KSF. These articles originally appeared in The AMSAT Journal from 2019 to 2021.
Unfortunately, because both satellites and URLs change over time, the currentness of information such as this can quickly be overcome by events. However, the tools and techniques outlined in Keith’s beginner series are still very much applicable to operating on current and future AMSAT satellites. For the latest information about satellites currently in orbit, please consult the AMSAT Communications Satellites page.
More useful information for beginners is also available on the AMSAT Station and Operating Hints page.
Frequency and operational information for current satellites can be found on the AMSAT Communications Satellites page
More detailed information can be found in AMSAT’s Getting Started with Amateur Satellites book which can be purchased on the AMSAT store