Many new pilots have questions about what sort of helmets and communication systems to use.  

After a decade and a half of trying every option, I just use a skate helmet together with behind-the-head 3M protectors:

https://www.amazon.com/dp/B00MYALHO2/

https://www.amazon.com/3M-Behind-Earmuffs-Conservation-H10B/dp/B009POJ1XY?th=1

To that I add a temporary Bluetooth comm unit whenever it's needed:

https://www.amazon.com/s?k=bluetooth+communication+for+helmet&ref=nb_sb_noss_1

My favorite kind of comms (made by Allros) are not currently available on Amazon, but any will work.  When you do buy them for yourself, it's best to get whatever brand your friends are using, so that you can all connect to one another easily.  Read reviews to be sure that the product you purchase will get loud in your ears.  Sena brand is popular, but they're severely overpriced.  You don't need to spend more than $50 for good Bluetooth comms.

If you just pressure fit the Bluetooth comm speakers temporarily into each ear protector, you can switch them out for other units in just a few seconds.  Also, if you use behind-the-head hearing protectors (the kind with a temporary strap that goes over the top of your helmet), you can change helmets whenever you want, or fly without comms, whenever you want.  Most PPG pilots don't use comms every flight.  I typically just use some cheap squishy in-ear protectors to keep engine noise from hurting my ears.  It's much more comfortable to fly without comms and heavy ear protectors, if you don't need them.

Some guys like to use the cap mounted versions of 3M or similar hearing protectors that get screwed permanently to the helmet, and rig the comm wires in permanently, so they look nice - that's exactly what you'll get if you buy an over-priced commercial PPG comm helmet, but I like to use different size helmets in the winter and summer, to accommodate extra hoods or hats in the cold, and to fly without those things in the heat.  That's why I like the simple modular setup in which any piece can get quickly changed out, added, or removed.  Also, be aware that the wires on most comm units are light weight, and when permanently mounted, they can be a real pain to fix if they break.  I've had those little wires break just from transporting them during air travel.  For all those reasons, I don't like permanently mounted comms.

Most pilots these days prefer Bluetooth comms over radios, because they allow 2-way hands-free talking, typically with very good noise reduction, and they can be used with cell phones for group communication, and for recording audio.  During training I do demonstrate how to use 2-way short wave radios, but those tend to be more problematic, and are only really useful if you've got a large group of pilots far apart from one another, a long way from civilization.  They can be trouble if anyone in the group accidentally presses and holds their push-to-talk button.  Be aware that some radios require a license to use legally.  If you want to use a radio and Bluetooth headset together, you can get hearing protectors with radio connectors already built in (the unit below is a behind-the-ear model):

https://www.amazon.com/Rugged-Radios-H41-CF-Headset-Control/dp/B0147PVPAW/

or use a temporary pressure fit unit:

https://www.amazon.com/CQtransceiver-Motorcycle-Helmet-Headset-Walkie/dp/B00UH266FY/

I do show students how to use aviation band radios when communicating with ATC, but you rarely need to do that during normal paramotor activities.  If I ever need to carry an aviation radio, I just stick an earbud headset inside my hearing protectors, and push to talk directly on the handset, which I keep securely tethered.

I'd suggest looking at some of the different headset options during training, and seeing what makes most sense to you, after you've tried them all.  Most of my time in the air, I haven't needed any comms at all - just a good helmet.

For training, just be sure to have a good fitting helmet.  I'll provide comms.