Hi Sheasbathlab,
You may need to provide some more details as to what you have in mind so others may be able to help. For example, you stated you have your own website - who is your site host - I'm assuming it's not Square. If you want to use Square, you first need a Square Account - I'm guessing you have that already.
There's two ways you can use Square to sell online through your current website. One method is to setup a free Square website with the items you plan to sell. Yes, that means that you will have two web sites. What you do next is link your free Square site to your current site - it's easy. That's exactly what we have done and basically it's seamless to your customers. Our main site describes our business, our products, has links to other sites, answers questions, has faq's and contact info. In addition, it has a Shop link which takes the customers to our free Square site - there they can shop online and Square handles the rest.
Your other option is to build your own shopping cart and through the use of Square's APIs, SDKs and custom coding, you can then use Square to process your customer's purchases. This method is used by Developers and more advanced coders.
As for Stripe - like Square - it too is a credit card processing service. There's pro's and con's for each so one has to do their homework to figure out which service best fits one's needs. There's info here about both Square and Stripe. Square is easier to use and jump into, whereas Stripe requires a bit more setup time if you want to take full advantage of its capabilities. If you have an in-house developer and you only plan to sell online, Stripe may work well for you. If you sell in person and also want to sell online - Square may be your better option. That's why we use Square.
