Encounter difficulty

Hi, inexperienced DM here. My party (4 players) has recently finished last starter quest (dwarven excavation). They had no problem with the orcs at the end despite not being full health, it wasn't even a small challenge for them, is it just because they have finished all starter quests? Will the encounters in the next quests be a challenge or do you suggest making some changes to them? Are there any changes overall that you suggest I go for? Any suggestions are appreciated. (Sorry if there are errors, not a native English speaker)