Well different ways work for different people! I'd definitely try a few different things. If you do decide to get a heat lamp, I suggest a dimmer along with it because they can spike up surface temps at 100+ just like heat mats if not kept on thermostats. Observe your snake's behavior and which side she prefers. Make sure she's thermoregulating (moving from warm to cool, vice versa). It's really a trial and error run the first few weeks as I've learned haha. But there's no set rule of law here that you have to follow. What works for your snake is what works.

And yes, specially babies! They'll be very shy and probably retreat to the closest dark spot they can find away from the possible snake eating human! Wahhh! 😂 But keep changing the water in the viv and they'll identify your scent eventually and realize you won't eat them haha.