Hey Macabre!
I think that it looks fine. In my case, I have very large hands (I could get my fingers completely around a 50mm) and it really never helped me at all! On my 45mm, the fact that my fingers are longer, and that my hands are large, hasn’t helped or hindered me in any way.
Mainly, what I’ve found, is strength to be an issue, rather than reach! My forearm strength has dwindled a bit since I stopped rock climbing, and without that, my grip strength has gone. I struggle sometimes, but I’ve been working hard to get the strength back.
You can purchase grip-strength, uh, strengtheners? They’re often at placed that sell climbing gear and such. Some look like rubber rings (that’s what I have) that you squeeze as hard as you can! Depending on where on your fingers you place it, the harder it gets- out toward your fingertips is hardest!
Also, for actually gripping the pole, I don’t find that I ever really try to grip it super hard all the way around. When I spin, most of the strength and grip comes from right around my main knuckles, and is created by the force I’m placing on my hands pressing outward away from the pole. No thumb required 😉 And, for anything split-grip, the “gun position” makes a lot of the finger wrap a moot point. Any kind of climbing or other things is more about what’s happening between thumb and other fingers, with your palm, instead of actual finger strength or grip.
So, I think you’ll be just fine working with the 45! Remember that, as a beginner, your grip strength will simply grow and get better! Be good to your forearms, and they’ll be good to you 🙂