I have all my gear into power strips, which are in a branch configuration, so a 3 way, which has in each socket another 4 or 6 way strip, some of those have additional strips.
But I made sure I knew the total load with everything on, by using one of these:
Suffice to say never use toaster, kettles, heaters or any other high energy devices in the same sockets or power strips.
I have around 46 devices all terminating in the same wall outlet, and the total current is a little over 300w which is around 2.5amps at 240v, each power strip is 10a and I make sure that I share the load as evenly as practical.
Also DO NOT cheap out on electrical hardware, but don’t go for designer consumer stuff either (which is usually garbage) get your power strips and sockets from a reputable manufacturer, I always use MK or similar industry standard stuff - Crabtree, Schnieder, for wall outlets, and avoid fancy looking metal faced outlets - they are crap. For extension/power strips avoid the cheap plastic looking ones which cost less than £10, go for well made reputable brands.
Most studio gear is pretty low energy, a good rule of thumb is stuff with motors and which produces heat is higher energy, so amplifiers, PCs, large analogue mixers etc. and stuff with wall warts or line lumps like sequencers, drum machines etc are usually very low energy.
You can read the PSU specifications and work it out from there.
Keep an eye on the condition of power strips, and don’t stress the plugs/cable and never have them coiled up in use, buy the closest length of cable you need.