Just try to use your cards more rather than to use cash or debit, if possible. And make sure you are able to keep your debt levels low. Basically practice good credit habits and you will be fine in 6 months. That card really isn't that hard to get at all if all you are shooting for is a 5k CL
JPMorgan Palladium (100k), AmEx Platinum (NPSL), AmEx SPG (46k), AmEx BCP (42k), Chase Sapphire Preferred (47k), Citi Prestige (31k), Citi Thank You Preferred (27k), Citi Executive AAdvantage (25k), JPMorgan Ritz-Carlton (21k), Merrill+ (15k), US Bank Cash+ (22.5k), Wells Fargo (12k), Bloomingdale’s (12.4k), Chase Freedom (5k), Discover IT (5k).