i think aiming for stats of 12/10 to 10/8 (full ring) is a good way to learn. People say just aiming for the stats in themselves is not ideal (which is kinda true) but the fact is it makes you learn what a strong hand range IS and at the same time shows you what to cut out of your opening range, and you can learn about position etc. Its a good concrete thing to aim for and a great framework to learn about other basic aspects of poker from - at least it was for me.

i still play roughly that tight preflop in full ring (10nl and 25nl).