Thanks everyone for your advice! And fluffbags, you are amazing. You seem to always know loads about everything!!
I am going to get some proper anal lube for sure. I kind of thought there couldn't be much difference between it and regular water based lubes to be honest so learned something! Also we are going to practise with our anal toys more too. :-)
Hubby finds it uncomfortable unless I use a butt plug first to stretch things. So I would reccomend that. And definitely an anal lube