Active Campaing Integration and Automation

Hey! I need to integrate and automate my email marketing in this steps: I have a registration form on my site: 1- User sign up: 1a. User Succesfully signs up I) Send Welcome Email II) Send Recommendation email after 1 day 1b. User have error I) Welcome email but explaining the possible errors II) 30 mins after user is not sucessfully registered send email III) 1 day after user is not sucessfully registered send email. III) 1 week after user is not sucessfully registered send email. III) 3 week after user is not sucessfully registered send email. 2- User have a 3 day free trial 2.a 2 days after sign up, send that you only have 1 day left, best practices, recomendations. 2.b 5 days after sign up and user hasn't pay, send email to invite to referral program. 2.c 8 days after sign up and user hasn't pay, send email of other users feedback. 2.d 2 weeks after sign up and user hasn't pay, personal follow up email. 2.e 3 months after sign up and user hasn't pay, send 3 day free trial. 3- If user buys 3.a send email 1 day before expiring & invite to referral program. 3.b 2 weeks after activity finish email you have to be an expert integrating this, looks very simple to do it but just don't have enough time to figure it out.