Blipping is imho done after selecting the next gear and before the clutch goes up. In practice I do it in parallel, i.e clutch in, selectnext gear AND blip, clutch up.
When you have mastered that, then try braking at the same time.
1. Brake hard with the top of your foot before a corner in high revs
2. Clutch in (during braking)
3. Blip the throttle with the bottom/heel of your feet AND select down gear with your hand - (still braking and clutch in)
4. Clutch up
5. Brake up
6. Steer into corner
Then for the fun part extend this to:
1 till 4 above
Steer quickly in opposite direction of corner
Steer into corner hard
Release break
Catch slide by opposite lock / steering
Put the throtle down hard and balance slide with steer and throtle
Mark