The unknowns are whether or not the compressor is engaged and what the pressure is; at least on the low side.
As mentioned, DIY A/C work can be a bit hazardous to your health because if a hose or refrigerant can decides to blow up it will happen in a nano-second and can leave you cut, frostbitten, or worst case; blinded for life.
I consider myself proficient with A/C but got a bit careless a decade ago with a home central unit. A 108 outside, sweating like a pig, and let my mind wander for a second. The resulting 1/2 second blast of R-22 instantly numbed the tip of my right forefinger and it’s still numb to this day.