Samson Expedition XP106W 100W Portable Bluetooth PA System with Wireless Mic

I’m trying to find a Lavaliere microphone that could work or pair or have an adapter that fits this speaker. Any advice?

would this work for a clinician for horsemanship to address riders in an outdoor arena and an audience of maybe 20 outside the arena?

can you use it with a stand?

Can I connect it to a laptop through Bluetooth. Then use its microphone for input source, and use its speaker for output source for my laptop?