I need help for FreeBSD

[Moreno Rugo]

Hello,
my name is Moreno i've secondary school only but i've the passion for 
computer, i've woriking on IT and Trainer Linux for HP, SUSE, REDHAT, 
IBM Telecom Italia (now TIM) and more, now i'm retired because i want to 
take a diploma from zero and i want to change my operating systems im my 
house from Ubuntu, Debia to FreeBSD, this is the first question can you 
suggest some manual please? , I'm start to learn C and i like to become 
a programmer for FreeBSD project is this possible?
Many thank's

-- 
Moreno Rugo
System Engineer GNU/Linux
(will sysadmin for food)