Lots of lube, get comfortable. Tease yourself . Use your fingers. Get your anus relaxed. Then insert a finger. The. Two. Take your time before using your vibe. Geta plug too and use it.
I don't think anyone here has done so judging from the answers. This won't help you either but guys out there reading this, it feels great to squeeze as tight as you can when you have something inside
Anal insertion can be extremely pleasurable as long as you clean yourself out correctly and use plenty of lube. For newbies patience and relaxation is key. Start by rubbing. That can feel great and relaxes the spincher.