The design process
When it comes to designing a website, you basically have 3 choices. Let's pretend you're going to buy some new furniture....
You decide what piece of furniture you want and then you go to a bespoke carpenter and have them design and build your lovely new item.
You don't have the kind of budget needed for Number 1 but you really don't have the time or skill to do it yourself. So you go to a DIY store, pay for the furniture, and then pay someone to build it for you.
You don't have the budget needed for Number 1 but you do have the time and skill to do it yourself, so you get the tools you need, you go and buy your furniture and then you build it yourself.