Congrats gramps! Welcome to the club. You can always use the two crop modes of 35 and 50mm if you want more reach. Good idea on the lens cap. The first GR3 I bought from
Park Cameras came with one and then I broke the camera, got a refund, bought a second one from them but that didn't have the lens cap. I bought this one, perhaps it's the same one you ordered.
https://www.amazon.co.uk/gp/product/B07WC1XQV9/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
Be careful to remember to remove it when switching the camera on. I forgot once or twice and the extending lens pushed it off. No biggie but probably not great for the lens motor if it was done regularly. 28 clicks is very good. I paid £599 and got 400 clicks.
As well as Ricoh discussions here on TP, another good resource that I use is the 'Ricoh Talk' forum on DPR.
https://www.dpreview.com/forums/1013
You might still yearn for an EVF but trust me, after a short while you won't miss it anymore and you'll be getting one handed shots just using the screen that you might not have got with another camera. You'll love the snap focus too. I set mine between 1.5 and 1 metre, but mostly at 1.5m. Here's a couple of tips. You can use snap focus and still use auto focus by half pressing the shutter button. For me personally, I've assigned auto focus to the Fn button. So we can alternate between snap and auto focus instantly. Another tip is that you can turn the camera on to look at shots you've taken and look at the menu without needing to extend the lens. You just need to press the play button at the top right underneath the mode dial, and press it again to turn the camera off. To save battery life, there's a number of things that can be disabled but in general, I turn the camera off between shots. I didn't think that was a great idea at first for street photography but the camera is so unbelievably fast to turn on and be ready. Did you buy two spare Ricoh or aftermarket batteries? I bought 4 aftermarket batteries from two different companies which came with chargers, all for less than the price of a single Ricoh and they all perform as well and for as long as the Ricoh.