Anal‼️

So my guy wants me to try anal.. I’m kinda scared.. I mean I’ve never tried it and his dick is pretty big so it makes me really nervous to try. He has only asked once and never said anything again so he isn’t pressuring me to do it so I kinda wanna do something special for him for Valentine’s Day. Does anyone have any tips or anything to help me prepare myself? Anything will be appreciated. I just want to make this experience enjoyable for the both of us.