leveraging at 10:1, a few bad trades and you're done. probably want to start with $100k to trade with, probably don't want to risk more than .5%-1% per idea. usually the losses come out of your end, so depending on how many bad trades you want to allow yourself before youre out is up to you. have you looked at other firms that take on all your risk? might be a viable option for you. at the very least to learn for a while. im not saying youre a newbie, just assuming since youre looking to put ip $3k. i just think at that stage you want to have the leeway to lose for a while, and its easier to handle when its someone else's dough.
other than that, i don't think its a bad deal (pretty avg). probably not letting you hold that leverage over night (good for your sake - you don't want that over night risk at this stage) also, the platform charge is another way of recouping what theyre 'saving' you with the lower (.001 per share) commish.