I personally feel the game is slightly too easy on balanced so I go back and forth with tactician.
I d recommend you go to YouTube and watch the combat tips video from wolfheartRPG.
My wife is not a hardcore DND player and it helps her understand better the mechanics.
If you simply get your party of 4 together and play as a group you should survive all encounters without any issue and you can short rest after. Then long rest every two or three fights.
