Help with Woocommerce Subscriptions

Website is already built and functional but I need some help customising somethings such as:
Check plug-ins not conflicting - I am getting error messages when I try to do something’s so want to check everything is working as it should
Refer a friend plug-in - get referral code info to feed to drip email software
Check order emails to customers set up correctly
Send email to our account when customer reactivates account
Refer a friend pop up after first purchase
Change ‘we’ll do our best’ script after purchase
Feed subscription status to drip email software
Configure subscription payments to occur on set date after sign up
Automatically align subscription payments to set date sequence
Delay payment on orders for deliveries in the future