is the amp too powerful..and would it hurt or damage my speakers?

No, really. Audiophile annals chock full of tales of speakers blown out by flea watt SETs.

The reason that an under-powered amp will be more likely to blow speakers is that people will want to turn up the volume.  You will reach a point where the amplifier power supply runs out of gas and the output signal is actually clipped or "flat-lined".  This flat-line DC current will ruin tweeters very quickly and could damage other parts of the woofers and crossovers.

It's always more healthy to get an overpowered amp so that you always have a clean signal output to the speakers.  It's better to send a "clean" high powered spike to the speakers.  They can handle a one time spike that is over their rated power easier than they can handle a "clipped flat-line DC".  It's very easy to hear when the speaker reaches maximum excursion and you can just back off on the volume (and don't hit those levels again).

With amp clipping, it's actually harder to hear when this happens.  You could be "hearing" a somewhat clean sound, but the clipping is occurring and slowly damaging your tweeter voicecoils.

Yup that same 2-18 watt SET, built with keeping your speakers safe (in mind) can be the worst.

When an owner  thinks "WHAT can that little sucker do?".. BUT not have some of those GREAT safeguards built in.  Answer: Burn everything up.. Overheating... and more so because, people tend to PUSH, the mighty "FLEA". There are a lot of good designs, vigilance is always your best friend but fuses no matter the design, still aren't fast enough for some driver/amp failure, no matter the reason.

Regards

It’s clipping from running an amplifier that’s not powerful enough for the load that damages speakers.
Its more than just the power rating you need to understand, as some manufacturers use peak measurements for RMS values. Look for a well designed, shielded and sized PS. It’s the foundation for any great sounding system.

More power is welcomed, driving at full blast is not in either case. Underpower you burn the tweeters, overpower you burn xovers and woofers.
G