Fedegenerate
In general I look any helmet I intend to buy on
https://sharp.dft.gov.uk/helmets/
Then make a decision on acceptable risk. For me: pillions are only allowed in 5* helmets. My daily, a Shoei NXR, is 4* but light af. Helmets are for when things go wrong, even though they're worn every ride, I want them for the crash.
Specific to that helmet, they don't have a sharp rating so that's an immediate no for me, that aside I'd worry about what those ears do in a crash also a no. I wear a cardo which can react negatively in a crash but it provides some utility as compensation. It's your head, your risk, your decision.
Here's hoping, I find it fun even when it's scary. Bombing too hot into corners or cars merging into where you are intense situations.
I do hope you get the book, I wish it came with exercises but it's intention is to be used along side the practical police instruction. Learning to E brake without ABS, trail break through corners, etc are useful skills not just to go fast, but to stay alive when things don't go as planned. But, helping make accurate plans are what the book excels at.
Oh, I forgot about independent mobility... Going where ever and whenever you want is AWESOME. Probably the best bit if I'm honest, though I like riding for riding's sake.
A fellow all weather rider, welcome to the club, we had snacks but they're soggy now.
Gosh, I am so excited for you, my first year was so fun. Particularly riding the tits off a 125, fully pinned throwing the thing around like it's nothing, genuine "happy place" stuff.
Twisties out beeline home is how I do fun days, also how I commute too. Do you have a car license or is this going to be your main form of transport?
It's a bit far, maybe you'll get pulled into the Iotn Butt UK stuff and start ranging farther afield
Not so much advise as finding good roads and solid stops. I prefer solo rides but it depends on who you are and why you're out. Come to Yorkshire, we have wonderful roads and beautiful scenery and a 125 won't run you to afoul of our notorious police.
Good choice, my first bike was a 125 CBR and my current cb600f doesn't bias my opinion at all. Do you have friends/family to toddle along with?
Do you know what kind of bike you're wanting? Adventure, sports, cruiser etc? No more unasked advise I promise, I just like talking bike.
"Motorcycle Roadcraft: The Police Rider's Handbook" is an excellent read. Get it early and you won't have to unlearn anything.
I get that. My mum rides a helmet that she attaches ears/mohawks to, like these. My SIL covers her helmet in one of these things. Or, find a graphic you like. There's options to make a boring helmet what you want.
Currently, I draw as little police's attention to myself, I have the stock quiet pipe, the stock tail and plate, I wear hi-vis, I look as boring as possible so I can ride less boringly. Part of that is havjng a plain white helmet, doesn't hurt that no graphics are cheaper.