hi, im practicing safrus. i reccomend what i did/am doing: learn “mishnas hasofer”, “mishnas sofrim”, “mishna berurah hilchos tefillin”,”likut sifray stam”, and, most important, find some local sofrim to demonstrate some things and answer any questions you have. last, a helpful site is “ctc torah.org”.
if you ever want to be certified, the best place in USA or israel is the “vaad mishmeres stam”- 718 438 4980. before going to them, check with a sofer to make sure you’re ready.
hatzlacha,
Mishael Keller