Specific whats, whens, and whys will depend on other factors (most specifically being your goal), but workout nutrition is always the place to start for anyone who lifts.
This article explains why having the right protein and carbs in drink-form can improve performance and recovery. Plazma is top of the field, but Surge Workout Fuel is the next best bet (similar ingredients, more budget-friendly).
Once that’s in place, you might want to bump up your daily protein with a shake sometime during the day. This article explains the difference between whey, casein, and hydrolyzed casein, and gets into what’s best to use at certain times of day.
But if you’re getting confused, just simplify. Figure out your specific goal, figure out your training and nutrition plan, and then figure out the bang-for-buck supplements to get you there. Some people use several different supplements, each for strategic purpose, and they can be super-effective. But if you’re already getting confused, there’s nothing wrong with sticking to the basics.
Especially if you’re still new to training, there’s no reason to throw a half-dozen supplements into the mix. Get up and running with your current approach, plus workout nutrition. Squeeze some results out of that, and then start plugging in things that can nudge progress along. Like a natural Test booster, or creatine, or something to help clean up nutrition and drop fat.