I just wanted to add to those who point out that the answer to the question depends on what the school permits, and what the kid is ready for. My D took 4 APs as a HS freshman, ended up with 18 in total, and was valedictorian. She figured out in 7th grade that the only way to be competitive for the val/sal honor (and the full-tuition scholarship to Flagship State) was to take the AP courses with the added GPA weight.
But she could handle it - she was an exceptional student, and she needed to be challenged. She could (read/process/absorb) very very fast, and she could write a 10 page paper in under an hour - while many of her friends would complain about spending all weekend with homework in a single course, she’d have finished that classwork Friday afternoon. Not all schools allow this, and not all kids can handle it.
D graduated from Stanford earlier this year. She had plenty of great ECs and her essays/rec letters were amazing. There were other kids there who had a lot of AP’s, and many who did not have nearly as many. For her, she believed the AP’s were helpful because they boosted her class rank, and made her do her best work. She is convinced she wouldn’t have been considered if she had taken only 5 or 6 AP’s - it probably would have knocked her class rank out of the top 10, and she’d have been bored.
I am not saying this to brag, but more to reassure OP that It is perfectly fine for kids, and parents, to be thinking about the impact that freshman year courses will have on their future college application process.