Klaviyo Email Designer

We automotive racing safety gear retail company looking to setup e-mail campaigns and automations with Klaviyo. Currently we don't really do much e-mail marketing and generally just send a few campaigns here and there to existing customers not on any regular basis. We want to fully setup and utilize the capabilities in Klaviyo to grown repeat business, capture abandon carts and try to remarket to existing/inactive customers on a more regular basis. Some of the tasks we need are:

-E-mail Design
-Abandon cart campaigns (including some segmentation)
-Welcome e-mail campaigns
-After sale e-mail campaigns
-Inactive customer campaigns
-Signup popup form (BigCommerce)
-A/B Testing as needed for campaigns

We would like this to be an ongoing project to continue to create marketing campaigns after the initial setup is complete and maintain the campaigns for optimal conversions.