Welcome to the site, you've been here a couple months, but I've yet to see you.
First off, I know some of the BRM sites say that 300 Big Bets are sufficient for LHE, but it is still fairly low, I would say upping it to more around 450 Big Bets would be a little more adequate for protecting your roll. With as small of a roll as you have, there really isn't much room to work with.
As far as your playing goes. Slow and steady. In that hour and ten minutes you probably didn't play more than about 90-100 hands, so you were winning ~5ptBB/100. Not sure if you know what that means, so if you don't, look up win rates. 5ptBB/100 is a decent WR for LHE, granted, that was only one session. What you really need to work on if you're really looking to progress is the ability to multi-table. I personally don't understand how anyone could have a problem playing at least 4 tables at a time, especially a slow moving game like LHE. You don't have to watch every move that is going on at the table and make observations based on them(actually, you should be doing post-session reviews and making some notes then).
You saying "I dont wanna stay at this level for an entire month
" is a scary statement, because that shows me that you just want to move up as fast as possible without putting in the work. You shouldn't expect to be able to move up a level every couple weeks, it isn't going to happen. With the current ability you're at right now, I would say to stay at this level for quite some time until you polish your skills up a little better(btw, I am not saying that you are not good at poker, I have no clue about that given my info). You're only going to lose more when you move up in levels like you have in the past. Lke I've said in the past, you don't go from learning how to shoot a free-throw to being in the NBA in a month, it takes a lot of time, effort and frustration. Good luck bro.
btw...attached is a little table I like that aliengenius posted that gives a pretty good representation of BRM.