You can't create a Shopify store without a template. Shopify needs a theme for its layout and design. Stores that don't use a theme are called headless commerce stores.

Yes, Shopify offers an email newsletter feature known as Shopify Email, which enables you to distribute promotional emails to your customers. You can create and send emails through Shopify Emails from your Shopify admin dashboard. Additionally, you have the option to utilize the default email templates or craft your own branded email templates.

To become a Shopify Partner, you must enroll in the Shopify Partner Program. Here's how:

The signup steps include:

1. Click on "Join Now." 
2. Fill in your first and last name, and email address, and create a password. 
3. Confirm your email address with Shopify. 
4. Complete the form with your business details. 
5. Access your Shopify dashboard. 
6. Once you've submitted the form, you'll be able to view your dashboard.

 By becoming a partner, you'll have the opportunity to create Shopify apps, become affiliates, and establish your own Shopify stores, among other things.

Yes, you can sell various types of services on Shopify like health, education, consulting, memberships, event tickets, and digital gift cards.

The essential Shopify apps are:- 

• Shopify Inbox 

• Theme Access 

• Linkpop 

• Shopcodes 

• Fraud Filter 

• Headless 

• Hydrogen 

• Shopify Flow 

• Checkout Blocks

• Shopify Forms