The car will limit and control both AC and DC fast charging so it won't draw more than it can handle. I've used 60amp Tesla charging stations with my SR+ and all it does is limit your draw to 32 amps. On the topic of 32 amps, even if you had a car with a more powerful onboard charger like a dual motor 3 or an S/X, you will be limited to a 32amp draw because the second gen mobile charger has a 32 amp limit. I believe the old gen was 40 amps, but that was designed for Model S/X that need significantly more juice per kilometer driven.
Just leave the charging slider at 90% and forget about it. Trust me, after a month or two, you'll be baffled as to why you even worried about it for 99% of your driving situations. I used to set it to 70% and try to not drive below 30%, but first I messed up my BMS so my rated range temporarily plummeted, and second, it's a headache and waste of time. Don't do what I did, haha. In my experience, the settings below 90% are mostly for long term storage, where if the car was going to sit for a few weeks, I'd drain it to around 60% or so and leave it on the charger with the slider set to 50%. Like other users have said many times, generally the battery is pretty idiot proof. As long as you aren't charging to 100% and discharging to 2% frequently, it will probably have no issues.
The biggest way to save energy driving is go slower, this is obvious, energy drain increases EXPONENTIALLY with speed. If you went 10kmph (6mph) everywhere you'd probably get a 700 kilometer range (450 miles). Or more. If you're going 160kmph (100mph) you'll see that battery drain like crazy. 200 miles of range at that speed would be lucky. The biggest killer for me living in a Canadian city is not speed but cold. Less relevant in Georgia, but if you ever do a road trip through a cold area, be prepared to lose up to 40% of your range just heating the cabin. Unlike a gas car that always produces waste heat, electric cars have to make it to heat your car, and that energy is coming right from your HV battery. During the summer I find the AC uses a noticeable amount of energy, but nowhere near as crippling as the heat, the worst I saw was about 8% more energy usage on a really hot day in Vegas.
My energy consumption in the spring is about 121wh/km (195wh/mile). Winter I see about 200-250 wh/km consumption (320wh/mile-402wh/mile)