First, compare cards by representative APR, fees, rewards and whether they suit your needs, then use an eligibility checker before applying. Complete the application with accurate income and address details; the provider will assess your circumstances and decide whether to accept you and what limit to offer. Once approved, activate the card, keep spending within your limit and check each statement carefully. Pay the full balance by the due date where possible to avoid purchase interest; otherwise, at least pay the required minimum and follow the provider’s terms, remembering that missed payments can affect your credit record.