You charged thousands of dollars’ worth of appliances to a store credit card that doesn’t require payments for six months. As long as you make the payments in six months, your Credit Score will not be affected.
About How to Boost Your FICO Score
Good Credit Scores takes patience and persistence and there are quite a few ways to legitimately give your score a boost when needed. Over the long haul, you'll be rewarded with a solid FICO Score.