Ford Repair: 95 f150 starter replacement, starter solenoid, battery cables

Question
new to doing repairs. turning the ignition on results in a clicking
sound. the engine does not turn over. the battery was tested to be
okay. how do i identify the starter/solenoid/relay and what is
required in testing each and replacing each or all if needed. any
special facts like disconnecting  the battery  cables before
attempting to replace the malfunctioning part/s.
thanks for any advice.
ps it's a '95 ford f150, straight 6 cylinder, automatic.

Answer
You should pick up a manual by Chiltons or Haynes for your truck. You are asking for more info than I have time to give you. Yes, any time you are taking anything electrical apart you should disconnect the battery ground cable. Make sure the connections are clean and tight.