I wouldn't write-off all mini PC because of someone has run into issues at some point in time. I have 7 nodes and a PBS in my Proxmox cluster, mostly used business mini PC's but I also have a couple of off-brand Chinese models in the mix too.
While it's correct to say that some off brand stuff has unexpected quirks, that could be the case for most consumer equipment, even well know brands.
Key to buying equipment to run Proxmox is to decide what it is that you want to achieve, and then as a newbie, find the cheapest device possible which meets you requirements. I would say as a newbie don't even try to buy as a first option, see if you have an old laptop or PC hanging around doing nothing. Just about anything will do so long as you can throw 8GB RAM and a small SSD at it.
If you take that route then you can gain some hands on experience with Proxmox, gain a better understanding of what you want to achieve, your own personal tolerance for trolling forums like this in order to get things working & getting the most out of the available hardware.
Lastly I would suggest that what's import for a Proxmox lab is not the same as for a general PC, CPU speed means almost nothing, while the number of cores is far more important. The expandability of the RAM is most important, followed disk expandability. But you'll figure that out within a few months of getting your hands dirty. For that reason I wouldn't recommend the model you have posted, because it seems to only support a single SSD/NVMe drive, the N150 only supports a single memory stick & you want to try to get USB3.2 (in case that is the only way to expand the box, for disk or networking). All the rest of the 'bells and whistles' are far less important to Proxmox, since you access via the webpage and the server runs headless.