begining moves
As black defend 1 e4 e5 and 1 d4 d5, as white open 1 e4.
Four common sense rules:
1) Only play your d- and e-pawns.
2) Play knights before you play bishops
3) Do not play the same piece twice
4) Do not pin Nf6/Nf3 with Bg5/Bg4 before the opponent has castled O-O
All 4 rules have exceptions, but if you follow these, then you will be fine.