[Pawel Kusmierek]

1- No one wins a race on turn 1, but many loose it. Break early on T1.

Uhm, no, depends on the track and the racers. If track has little opportunity for passing and racers are of similar skill, race may be decided before, in, or soon after T1.
Also braking early for T1 is a good recipe for being destroyed from the back even harder. For online racing probably the best strategy is tap the brakes gently early to turn on your brake lights , and then brake normally. Of course in cars that have brake lights

2- You need to pass half the other car on the straight to gain the right to dispute on the braking. Don't dive bomb.

The "half the car" rule is not set in stone and depends on the series.

3- Always leave space for you opponent. Don't cut or push him out of the track.

I can agree to that.

4- If you hit another car, wait and return behind your victim.

No, that's too much. Just return to the track safely. The victim may have spun out so that he needs to do a 6 point turn to get back on track, no need to wait for him. Whatever happened, happened. Even last weekend in Silverstone, Vettel cam back on track in front of Verstappen.

5- Respect blue flags.

Yes