Congrats on starting! I just finished up my first year so I can give you advice based on what I did but, disclaimer, it might not work for everyone.
By the end of the year my study plan was just making 3-4 passes through the PowerPoint material before the exam came around. That's it. One of these passes included watching the lectures at 2x speed (this took a bit of getting used to) and only attending lectures that were mandatory, while the other 2-3 passes were just going through the PowerPoints and quizzing myself along the way. It could be different for each school I guess, but all the material you need for the exam should be on the PowerPoints so if you know these cold you'll be good. At least for me, it didn't matter for which class, by the time I made that 4th pass through the material that **** was ingrained in my brain for the exam. This makes it real easy to use a calendar and draw up a study plan leading up to your exams (finish x number of lectures each day).
If you wanted to incorporate Zanki early on (which I wish I did) I would personally recommend waiting to start a specific deck until AFTER you've taken the exam for that subject. Some people like to use it as a learning tool alongside classes, but at my school there was too much specific information in lecture that wasn't in Zanki to where just using those decks would have screwed me (or I at least would not have done as well in classes as I ended up doing). If you start using the decks after you've been tested on the material in class then it's much easier to cement that material in your brain for boards. I ended up having a lot more free time than I thought I would each day when I finally got into my groove (even with weekly exams) so doing Zanki alongside your classes shouldn't be too taxing.
I recommend going HARD until you're through your first round of exams. I probably don't have to tell you that since most people come in prepared to study their asses off, but not everyone does and they're stuck playing catch-up at the beginning which would suck. Once you've taken your first round of exams you can gauge where you're at and back off from there where you can. I started off going to all of my classes, going through all of the PowerPoints and making a ton of Anki cards based off of these, and then I would study the cards until the exam. I had never used Anki before and it amazed me how well this worked. This didn't last though because making my own cards would take forever and I ended up having to ditch Anki for the most part throughout the year because of this.
Once you figure out what works you can start to relax a bit on studying all the time. I ended up having plenty of time for the gym each day, and unless an exam was the next day I would usually stop studying by 8 or 9 to hang with my wife. The point of me saying this is that the first year doesn't have to be as bad as some people say it is if you study smart instead of just super hard. I ended undergrad with a 3.4 overall GPA, reevaluated my study habits while waiting to get started in medical school, and finished this last year with about as close to a 4.0 as you can get. I say that because I'm not an inherently smart guy. If I can do well, then honestly anyone can.