When you approach airport tune in to approach frequency and ask for “VECTOR” direction to Active runway or specific runway, he’ll give instructions for direction-attitude-speed to intercept localiser. Once you are there tune in to Tower:
Let him know “you are on final to land/touch&go”
If there is no approach frequency, Tune into tower tell him you are “INBOUND” to land/touch&go. He’ll direct you to runway
If you are doing pattern work you don’t need to call every leg of the flight but Base and final I always do. Tower knows you doing pattern bcos you diclared it when you took off.
If you don’t do any of this that when Tower ask you to “SAY INTENSION”
Also you Might get “VECTOR” from Central frequency after you filled full flight plan. Thats another thing
I’m not expert not done for long hope I’m not wrong,