Feeling overwhelmed

First time mum, feeling very anxious and overwhelmed right now.. 34 + 2 today.

But I'm feeling anxious about the baby teething/toddler age... teaching them, the later ages, I am worried I will not be good enough at all. I keep stupidly reading those 'funny' mum blogs about how awful it is having kids blaaa bla bla, trying to be funny and helpful to other mums, but I'm reading them feeling overwhelmed and sad!!??? Help. 😬😬😬😬