8 years sober from sex, porn, and love addiction. I put together resources here.
Similar to you, I discovered porn early in childhood. That was one of the events that flipped a switch in me, leading to a near lifetime of sexual obsession, and compulsive sex and relationships while committed to someone else, until I literally lost everything.
Glad you recognize needing to change so early. Abstinence was the beginning for me, but it was more to clear the brain fog and develop a healthy attitude towards myself and then towards others, which is leading towards a healthy attitude to everything else.
I’ll let someone with direct experience in nicotine addiction address that, but from talking with others the recovery process is similar in many ways.