annoyed with friend and her parenting

ok i’m sorry this is just a little rant but i get so annoyed and frustrated with my friend. she’s 17 with a 5 week old (i’m 20) and even tho she lives with her parents i feel like no one is telling her the right and wrongs of taking care of a newborn!! like she told me she took her daughter to an amusement park the other day and she was in the sun ALL DAY . I asked her if she tried to keep her in the shade and she was just like no not at all 😳 i don’t want to be rude or scold her or anything. ive been subtly hinting at offering to go to parenting classes with her which i think she’s interested in but ugh idk what to do (there’s plenty of examples too, this was just the most recent) has anyone else experienced this? if so how did you handle it?