I am in agreement with Karthik. You can purchase a domain from Godaddy for an inexpensive plan. If you wish, buy a one year plan initially and if happy with it, when it comes up for renewal, go for the two-year or three-year plan which will allow you to retain the domain for that much time with no hassles of having to constantly renew it each year.
One word of caution: absolutely do not fall into the trap of emails supposedly from GoDaddy telling you that your domain is up for renewal, that you need to click on a link and update info of your bank account, card CVV, etc. Always contact GoDaddy's customer service no. and clarify whether or not your domain is up for renewal. If it is, then go directly to your official, valid GoDaddy account, sign in there (not through any email links sent to you) and do the needful.