That may be a little under what Disco will accept - as I recall, my Disco cards were approved using an EQ pull, and a friend I’m helping rebuild from a recent BK7 was declined for a secured Disco with a 599 EQ. Try the others that @Remedios suggested in addition to Navy. If you have to use OpenSky, there’s no harm in it and getting even six months’ worth of payment history on your record can make a big difference in scores and approval odds. It’s a secured and locked-in card - no CLIs or any frills - but it’ll build history and improve scores and that’s all that matters. Do it right and before you know it you’ll qualify for much bigger and better things!