Hi Carlos, welcome to Ribnet and welcome to boating.
Judging by your questions I'm guessing you're pretty new to this?
I'd suggest strongly that your first step should be to seek out a local sea school and do a RYA level 1&2 powerboat course. It'll be 2 really rewarding days that will teach you a huge amount and start your boating career on the right track. Your instructor will also be able to advise you on the right engine for your boat.
Here's the link to the RYA page listing sea schools by location
https://www.rya.org.uk/Pages/wheres-my-nearest.aspx