I meant turn once.. and then the next day if further adjustments are needed turn again. is this dangerous?
Regardless of whether you turn it once a minute,hour,day...- as I said above, the risk of damage is if you keep turning a truss rod without checking between each turn to confirm the neck has reacted toward your realistic target measurement - common sense. Standard middle of the road measurements are available at most guitar manufacturer websites, but afaik typical relief is a slight upbow (slight valley below the strings) that leaves approx 10/1000" (+ or - a few/1000" depending on pref - check with a feeler guage) between the top of the midpoint fret and bottom of the 6th string with 6th string fretted at 1st/end fret (the midpoint fret is the fret mid way between the 1st fret and the fret even with where the neck meets the body (end fret) - usually the 7th fret is the midpoint fret) - essentially you're using the 6th string as a straight edge along that part of the neck that has the truss rod embedded within it, to see the gap size between fret/string at the mid-point fret.
I find getting the hang of the measuring is the most challenging part of adjusting neck relief - after a few times doing this process you'll get to know if the neck relief is good or not just by eyeballing it or tapping the midpoint 6th while fretted at both ends. For me, a benefit of doing my own neck relief adjustments has been to get a better grasp on how much neck relief I like/prefer. It's easy to mix up neck relief adjustment, action, nut relief, pickup relief ... in terms of what those can mean for your playing if you have not at least measured those yourself on your instrument.
Sounds like you may be looking for an exact recipe that you can follow robotically/mechanically - if yes, you may have limited success doing your own setups or at least enjoying the process of doing it. Alternatively if you take the approach of logically understanding the process of each adjustment through various sources of instruction, and proceeding with this understanding then you can have some success doing it yourself without needing an overly exact "recipe" spelled out for you (if you understand it, you'll be able to list the detailed steps yourself for
youself in a way that
suits how you naturally work through a process). If you need a fine level of precision to understand initially, then there are also some great books out there on setup as well as youtube and manufacturer websites, and retail sites (ie
here) where you can see some structured instruction, but, as Rex mentions above, at some point yur gonna have to jump in. Maybe start out setting up your cheapest guitar or your least meaningful guitar.
Good luck!