Any tips to learn to tease my hair correctly ?

Hi, I'm a baby bat and I will soon be able to do a deathhawk (sort of, just without the hair strands right above the ears. Idon't know if I can still call it a deathhawk or not then).

I have very thick hair who handled few bleaching sessions in the past couple years very well, I think they are strong enough to go trough teasing it, I'm not sure since I've never done it before. But my hair being thick is also the inconvenient of it being really heavy, so I'm worried they will not stay in a deathhawk shape.

• How do I tease properly all those layers of thick hair ?
• Should I buy special brushes/products for it ?
• Anything I should do or avoid to do in particular ?
• How do I correctly treat my hair afterward ?
• Do you have a vague idea of how long I should let my hair rest between 2 teasing ?
• Is teasing bleached hair safe ? (I might dye my hair red in a couple of months)

Thanks !