Hi, I'm hoping to get some advice for getting started with rack-mount equipment, as all of my previous hands-on experience has been with tower-based equipment, and I feel it is time to move on to rack-mount. Can anyone recommend any beginner learning resources or give me good pointers to getting started? My thought was to buy a rack and get started using trial and error from there, but what are some important factors to consider, when buying a rack?

The first one, that caught my eyes was this one:
https://www.wattoo.dk/toten-19-gulvstativ-pa-hjul-42u-600x800mm-umonteret-sort-7340004666356#ws-productView-desc

It is especially interesting as it is delivered in 4 parts, that I must assemble myself, which is a plus, as I need to get it up the stairs to my second floor apartment. One thing, that I'm concerned about is the depth of 800 mm, which sounds shallow to me. The serves I find the most interesting appears to be around 900-1000 mm in depth, which sounds like a problem to me, but might not be, as the rack has no closed back or doors. Any guidance would be much appreciated.