Hi giesa welcome to the thread.
The problem is there isn't one perfect way to do Online Dating. It works differently for different people. I used to get annoyed at people with grammatical mistakes and typos in their profiles, but then thought - is that really going to bug me? If I met someone great in a bar, or at a friends party, I wouldn't find out about that kind of thing until we'd been together for a while.
Seeing so many profiles side by side can paralyse your decision making instincts and make you judge them on stuff like their favourite film, music, eye colour, etc, which really isn't important.
Don't look at all the emails. Pick a few that arrived first, just 5 or 6 maybe, then look at the picture. Firstly could you possibly fancy them. Those that are definite 'no's, discard. Then read the message. If it's generic and boring or short, then discard. If it's interesting take a look at their profile and see if they sound interesting. If not then discard. If you haven't got 2 or 3 to respond to, then move on to the next few, but I'd only do a few a night (this is the way I work, but I'm a bloke so it's a bit different)
Interestingly I read an article about online dating in a science magazine the other night, and it talked about an experiment with jam. They had two booths set up at two train stations, one showing a range of 6 jams, one showing 32 jams (including the 6 from the other one) The one showing only 6 jams sold a huge number more because if you have too many things to choose from, you start judging on the pattern on the lid, the crinkliness of the bow around it -all irrelevant stuff. Keep it simple.
Oh, and once you've got some dates lined up, we have soooo much more (bad) advice for you :)
good luck.