Mailchimp is the best newsletter provider for startups. You can start collecting email addresses up to 2000 contacts for free. I use it for 5 years now for various projects.
For the Basic gig I will add your mailchimp sign up form to your Wordpress blog. So you can collect email addresses from your website. You must have a mailchimp account to get starting. No modification.
Check out my extra gigs if you want me to make you your first newsletter design! I also provide pop up sign up for extra gig.
More about the extras: 1. Add trendy design to your sign up form and ad it to multiply places on your website. One modification is included.
2. You provide the content for your newsletter and I put it in a nice format. If no content provided I make a template by dummy content you can fill in later. One modification is included.
3. Pop up form: I set up a plugin for you to have a nice pop up when somebody visits your homepage. One modification is included.
4. If you have free gift (PDF, PSD, Video etc.) to give away to your visitors, I will set up your Mailchimp to send it to anyone who signs up.