You will likely not be able to run 3600mhz memory with a Zen+ CPU, and the current Ryzen 3200G and 3400G CPUs "ARE" Zen+, not Zen2. 3200mhz is likely the best you can do and you may only be able to do 2933mhz depending on the board and memory module. For the Tomahawk max and the Ripjaws, with a 3200G or 3400G, 3200mhz like I outlined in the build I listed will probably work fine.
Keep in mind as well, the 3200G is ONLY a four core CPU. It has NO hyperthreading so it is FOUR THREADS ONLY, while the 3400G is able to handle 8 threads, much like 2nd through 7th Gen Intel i7 CPUs.
Four cores is probably good enough for what you outlined above, but if this person decides to install a higher end graphics card and play more demanding games at all, it's going to fall short. Same goes for the assumption of power required by your estimates. I would not EVER go with anything less than a 450w power supply for ANY modern custom built PC, and I would certainly not install anything less than a pretty good 550w PSU for any system that you expect might be getting a graphics card in the next year or two. While it's true that there are graphics cards that might only require a good 450w PSU, any model that is moderately capable beyond the slot powered cards is going to need a 550-650w model. Otherwise, they end up having to AGAIN buy another part when they discover their PSU is not up to the task. Buy what you are going to need from the beginning. If you never end up putting a graphics card in it, you really haven't lost anything of significance because any GOOD 450w PSU, especially right now, is probably going to cost just as much as any GOOD 550w model.
As for the M.2 drive, I'd trust Crucial a LOT more than Patriot. Micron/Crucial has been doing this for decades longer than Patriot and is an OEM manufacturer of DRAM and NAND for these other brands as well as themselves.