Buy Hosting & Domains
There are many options when it comes to hosting.
These are companies that past students have gone with since they have competitive pricing and awesome customer service. You may choose whomever you wish. I recommend calling the customer service department of the company you are choosing to verify that they are a good fit for you and your business. Whoever you choose must have support for WordPress, MSQL and the latest PHP. Again, the nice thing about WordPress is that you are NEVER locked into any specific company. You can fully own and move your site as you need to with out disrupting your links.
Portfolio Gallery I use: Go Portfolio
HOT TIP: Save your receipts, the amount you spend on your business overhead (including your hosting and domains) is tax deductible against your annual freelance earnings. This means you pay Uncle Sam less taxes AND you get to invest in growing your business. Win/Win for you!
Disclaimer: These are student recommended.
I may have not personally ordered from all of these companies, do your due diligence to make sure you get what you need.