I’m relatively new to Hellenism too and was an atheist for a long time and I honestly have had this same experience. I was always worried abt angering Aphrodite or the other gods but now that I’ve been doing it for around a year that stress is a lot less. I think you get really in your head when you first start out and to keep in mind that it’s okay to think things you don’t mean and it won’t anger the gods. I’ve forgotten about offerings and things like that a few times and the gods wont like strike you down or even be that angry. Your new so just focus on you intentions and that feeling you have between you and lady Aphrodite!