Azores trip

Hi,
I spearfishing since 10 years in france and i want to do a spearfishing trip in Azores island to discover other waters whith big fish.:D
I search all information to organize my trip. I want to practice coastal spearfishindg and eventually bluewater.
I would go in may for 10 days.
- What the best island for spearfishing ?
- What equipment is needed ? Size and model of speargun , wetsuits .....
- Do you address charters and spearfishing guides ?
Thank you for your help
Piero