According to your business requirements, Shopify is a good platform to go ahead. But it is true you have to share a major chunk of your income with Shopify as they charge 2% for every transaction. The best alternatives to Shopify are Bigcommerce and Volusion. Both platforms beat Shopify in additional transaction fees since they charge none.

For information about other alternative solutions, you can read the following post:
https://www.inc.com/bill-carmody/top-seven-ecommerce-platforms-in-2018.html
https://www.jeffbullas.com/top-ecommerce-platforms/