I highly recommend Nina Heartleys guide to anal sex for anyone new and interested in anal pleasure. She is a wonderful teacher, and her movies are very couple friendly!
I have this toy and it really is a great one. However if you are VERY new to anal, (as in you haven’t even used fingers yet) this probably will be too big for you. It is really more for those who are comfortable with one to two fingers being inserted. The other problem with it is that while silicone is amazing in terms of material safety, it isn’t very firm so beginners may struggle a little with insertion which is not a good thing! If you are brand new to anal play start with something smaller, like perhaps a little vibrating plug and see how it goes with that before you move on to this guy.
**As always, lots of lube & lots of patience are key to anal pleasure! Anal should NEVER hurt! If it does, you are moving too quickly. I think Nina Heartley said it best with "the anus never lies!" If she is apprehensive or nervous she will never be comfortable enough to let you in and you are guaranteed to hurt her. Anal play is never something that can be rushed or pushed on your partner. Practice with your fingers first so you can feel when she clenches (STOP!) or when she relaxes (Proceed gently!) Make sure she is completely comfortable and aroused before even thinking about going to that area. I (and my partner) love anal stimulation. It can be an amazing thing if it is done right, so don't sabotage yourself by moving too quickly. I might even suggest letting her play with you first... I bet you would really like it!
Anyway, just relax and have fun!