Is this plug good for a beginner?

Yes. At 8.3 cm long and 3.3 cm wide with a rounded tip, it is one of the smaller metal plugs. The firm metal gives no flex, so go slowly and use plenty of lubricant.

Is the metal nickel-free?

Yes, the plug is listed as nickel-free metal, which matters for people with a nickel sensitivity.

The smooth metal surface wipes and washes easily. Clean it before and after use with warm water and a toy cleaner or mild soap, and dry it fully.

Does the jewel base keep it from going in too far?

The round base is wider than the neck and sits outside the body, which is the standard safety design for a plug. The jewel is set into that base.

How does it compare with a silicone plug?

Metal is firmer, heavier and smoother than silicone, and it holds temperature. Silicone is softer and lighter but grips more. The trade-off is feel versus give.