Anal sex takes time to get into, you simply cannot force yourself into the anal cavity due to it can rip. You also cannot have rough sex due to it can be turned inside out thats with doing anything in there to fast.
Start with fingers and anal lubes and anal ease then work your way up to toys. Beginner toys to be exact small plugs and anal beads or thr beginner anal dildos.
Do not use toys that do not have any base or a string or something you can retrieve it with or you will be going to the hospital embarrassed for surgery.
If you are looking for anal stuff go to Edenfantasys.com and use my discount code 215U and get anything you want.