Phase Order
Untap
This is the first phase of your turn where you untap all taped perminants.
Upkeep
This phase is a triger phase before your draw where you can use abilities as well as some abilities will activate every upkeep step.
Draw
This phase simply lets you draw your card for turn
Pre-Combat Main
This is 1 of the 2 main phases per turn, this is where you can cast all your spells and play lands.
Combat
This is the combat phase where you can attack other players
Post-Combat Main
This is 1 of the 2 main phases per turn, this is where you can cast all your spells and play lands.
End Step
This step is the end of your turn, you must discard any cards you have in your hand above 7 and well as some abilitys will trigger here.