If you're 1L, they'll know that, and they won't expect you to have grades; obviously the law review proviso won't apply either. The sad truth is that your chances of getting one of these jobs after your first year are slim to none, no matter where you are. Each firm, if they even hire hire 1Ls, only hires maybe 1-3 of them per summer; for each of these positions, it is reasonable to assume that there are probably thousands of applicants, all of which look pretty fungible as far as their resumes are concerned (again, you don't have grades or honors; usually, this process favors those with significant prior work experience, as it's the only way to set yourself apart from the rest).
The better course might be to instead focus on doing well on your exams, rather than sending out a bunch of cover letters and resumes that will probably get you nothing but depressing rejection letters (and perhaps at the worst possible time, depending on when finals are). It will work out better for you in the long term. As for your 1L summer job search, look perhaps at small or mid-sized firms that do work that interests you (or that looks interesting to you), at public sector/public interest employers, at judicial internships (if you can afford not to get paid), etc. All of these tend to have later hiring schedules, which will reduce your stresses, provide wonderful experience, and probably work just as well on a resume for 2L interviews (the basic point of the 1L summer is to have some law-related experience to talk about, but I don't think anyone will look down their nose at you if you worked at the public defender's office, rather than summered with WhiteShoe, WhiteShoe, and WhiteShoe LLP).