If you are marketing yourself, ideally you'll be able to use your first and last names (johnsmith.com or janesmith.com). Even if you aren't marketing yourself, it's not a bad idea to register your name as a domain now, in case you want to use it in the future. If you are marketing your business, you should see if your business name (yourbusiness.com) is available.
You can absolutely do that. If you want to upgrade to a paid plan to get some of the features you want, then you can switch at any time through the My Products option in your account or with the help of a GoDaddy Guide. Once you upgrade your site will have all the same customizations and work that you've already put in place, just with the added features. See Website Builder plans and pricing for more info.
WordPress boasts of being easy to use for amateurs. However, their support is ludicrously awful--forums only, no backup for more difficult situations. I had an 5 yr plus site that, several dead laptops later--a lost passord & original receipt, pre-2-factor, a free site--that I have lost access to . WP kept repeatedly sending the same canned messages that gave no help at all. I've been at it for WEEKS, & though onechat person offered to send me to customer help, that never happened. I strongly recommend avoiding WordPress.
The second disadvantage of using domain name suggestion tools is that some of the registrars reserve your keywords and suggest the available domain name to other prospective buyers. Let’s say you devoted 2 hours of time and found a very unique domain name e.g “laptopcasesforstudents.org”. Feeling very happy, you went to bed thinking – “I will buy this domain name when I have transferred the money from my bank to the Paypal account”.
A free online store made using Jimdo will enable you to sell up to five products, and that’s why it’s a mistake to call it a comprehensive e-commerce store builder. But you should remember that you get all this without having to spend a dime. Moreover, Jimdo doesn’t charge any sales commission like most traditional e-commerce store builder software (for example, Shopify).
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Using a search engine like Google, search for your proposed blog or website name. Does your search show any sites with similar domain names? If it does, try a different name. Giving your website a name that's similar to other existing sites is the first step to failure. Also, don't choose names that are plural or misspelled versions of existing sites.
You can make a website that lets you sell products and services if you have the Ecommerce plan. You’ll have an online store that will allow you to add products and services, set up different types of payment methods, and even specific types of shipping. Your store will be integrated into your website as a page. You can add featured products for your visitors to scroll through, make quick purchases using PayPal and Apple Pay and promote your store/products through coupons. You can also use the same type of email marketing that is included in the Premium plan to send email communications to your subscribers and customers about sales on your website, coupon offers and online events. Establishing a strong online presence can boost your sales.
TOP 5 FREE Website Builders for Small Business 
Your new domain is going to be your branded business name. You need to ensure that future social media profiles are available. Use Knowem.com to quickly check profile availability for your new brand and instantly reserve handles from services like Twitter, Facebook, Instagram, Pinterest, and others. It’s probably not a good idea to buy a brandable domain if its corresponding social profiles that are already taken.
Of these free website makers, we’ve ranked Wix, Weebly and SITE123, as the top three because of a few important factors. Wix has a very generous free plan, which is super easy to use – it combines creative freedom with tons of features. Weebly’s simple, stylish designs and handy tools make it ideal for small businesses. SITE123 is very beginner-friendly, with a focus on helping you get online.
How to Make a Website in 10 mins - Simple & Easy