I’m not sure what I should do

I have about $90k in student loans (47k in subsidized & unsubsidized, $43k in parent plus loans that i’m paying on my parents behalf). i’m seeing all of this talk about IDR plans not being a thing anymore, and i’m not even sure what i should do? my loans don’t go into repayment until july, so i have time to figure out what i’m doing but id rather have a plan ready to go now. i’ve also been told that it would be smart to switch the parent plus loans to a private loan instead- i want to cry every night thinking about how much this will be, and i’m scared. what do you guys recommend so that i can have the lowest possible monthly payments?