Week one: don't optimize, stabilize
New managers lose matches to incoherence, not to weak squads. Start with a 4-4-2 A or 4-3-3 A, all three sliders near 50, normal tackling, zonal marking, no offside trap. That baseline wins the games your squad should win and gives you a control group for every experiment after.
Learn one dial at a time
Change a single setting per match and watch what it does. Raise style at home; drop it away against the leader; try wing play the week you face a narrow midfield. One change per match means every result teaches you something specific.
Read your opponent before every game
The pre-match screen tells you their formation. Count their defenders and find their CAM or CDM - those two facts choose your counter more reliably than any meta list. When in doubt, the Counter Tactics library has a published answer for every shape in the game.
The two habits that compound
Habit one: test before matchday - a two-minute Match Tester run catches contradictions like man-marking with the trap. Habit two: run every plan through the Match Tester and read its rating and risk list; the feedback teaches faster than any guide, including this one.