By all means run some tests on a real device, especially on real mobile devices. Mobile device simulation is a new, evolving technology and less reliable than desktop simulation. Mobile devices cost money, of course, so we suggest taking a look at the Open Device Lab initiative. You can also share devices if you want to test on many platforms without spending too much.
It is beyond the scope of this website to go into the details of HTML. Fortunately the internet is full of tutorials, articles and how-to's. The website that helped me the most was W3 Schools because it has good tutorials from beginners to expert levels. Do a few tutorials and in no time you will be writing your own HTML web pages with images, tables and italic emphasis.

The major player in the blog game is WordPress, a content management system (CMS) that powers millions of websites, including The New York Times, Quartz, and Variety. WordPress-powered sites are incredibly easy to set up, customize, and update—ideally on a daily basis. You aren't required to learn fancy-schmancy FTP tricks (though you can certainly use them if you like), and there are ridiculous numbers of free and paid WordPress themes and WordPress plug-ins to give your website a pretty face and vastly expanded functionality. Though WordPress dominates the blogging space, it isn't the only blogging CMS of note, however.
CSS has only one drawback - a steep learning curve. It is not instantly intuitive. You need to study it and understand it and only then it will ‘click’. You cannot get on a bike and ride, you need to learn to ride a bike. You do not just start drinking beer when you turn 21 - you need to learn to appreciate the taste. CSS takes time to learn and appreciate.
The first thing to do when building your website is to develop a plan. Before you move forward, think about what you want your website to do, and decide what success looks like for your website. When you look back at your results a few months after your website is complete, how will you know it was worth it? Make sure you are planning your site to match your goals.
A domain name is the bit of the URL (the long address in your browser’s search bar) that identifies a web page — in this case your website. You can register them separately at sites like GoDaddy and Namecheap, but website builders offer to do it for you when you sign up with them. Most provide it for free (at least initially), while a handful charge a few extra bucks.