HI i'm new here

i just wanted to ask, i have been on PIP since 2017- and esa for around 6 years. i live alone (moved into flat back in 2017), no one is receiving carers allowence,
at the moment i receive 261 esa. 463/ PIP. if i ring up and ask for SDP would i be entitled to it?.
would this mean a change in circumstances? would it mean i am swapped over to universal credit?
thank you for your help!