Hello @SeferinoH ,
I'd definitely recommend looking into our overview on getting started with our services. Additionally, if you're already present on social media, then you can start building your contact list from them, by having them sign up for your newsletters, and directing them towards your website.
Hopefully some of our other Community members will be able to provide some additional insight. If you have any specific questions, or need some clarifications on anything, just reply here or make a new thread, and we'll be happy to assist. If you're looking to be able to screenshare your Constant Contact screen and get some one-on-one live support, I'd recommend calling our phone support line.