First thing that platform should I choose? I think the simplest way to build a webshop is to use a CMS system. Because the CMS systems are systems. And these systems are easy to use and easy to customize. I suggest that you choose WordPress. Why? I'm a software developer, so I can use any CMS system but my clients can't use the majority of the CMS systems. My experience is my customers can learn WordPress in a short period and it can be used by them easily. And you will see at the end of the article.
Installing the fix wordpress malware Scan plugin will check most of this for you, and alert you that you may have missed. It will also inform you that a user named"admin" exists. Needless to say, that is the administrative user name. If you wish, you can follow a link and find instructions for changing that name. I personally believe that there is a password security that is good, and there have been no attacks on the several blogs that I run, because I followed those steps.
The stronger approach, and the one I personally recommend, is to use one of the password creation and storage plugins available on your browser. I believe after a trial period, you have to pay for it, although people like RoboForm. I use the free version of Lastpass, and I recommend it for those of you who use Firefox or Internet Explorer. That will generate passwords for you; then you use find out one master password to log in.
It's a WordPress plugin. They are drop dead easy to install, have all the features you need for a task such as this, and are relatively inexpensive, especially when compared to having to employ someone to get this done for you.
Install the WordPress Firewall Plugin. Stop and this plugin investigates web requests with WordPress-specific heuristics that are easy to recognize attacks that are obvious.
Utilizing a plugin for WordPress security just makes sense. WordPress backups will need to be carried out on a regular basis. Don't become a victim of not being proactive about your 16, because!