When you start playing Go, you will be overwhelmed with good advice and information. Let me give you ... more advice.
1. Tactics: always read at least two moves deep. Do not assume that your opponent will not answer. If your move is only a good move if he doesn't answer, it is a bad move.
2. Technique: If after your opponent's answer your group has not many liberties, probably as many or fewer than before, then reconsider your move.
3. Strategy: Think about the game as most alive stones wins. Connect. Cut. Usually, strengthening/weakening a local position is best. If the local position seems ok, look for the largest open area.