If this is your first time starting up an online store, its best to go with the easier route and employ a SaaS (Software as a Service) eCommerce platform. Another option would be an open source CMS (Content Management System), however, that is only recommended for more experienced users, or those with a development team at their disposal.
We strongly believe SaaS is the most solid option as it doesnt require technical knowledge, its cheaper, and you can get your shop up and running within hours if not less.
For example, if you run into issues while managing your shop, you can resort to the services customer support, instead of having to hire a developer to take a look at the issue. The latter is usually much more expensive, especially in the long run.
You can try Boomer Marketing App to build an online store on mobile app even without need of a computer