I have just finished an access course and gained a place a good university. Here's what I did:
I was on 'universal credit' - the same as job seekers allowance - because I lost my job and struggled to get a new one straight away (this was before my course). Then when my course started, I was still on universal credit but my hours at work went down to 8 hours per week. I thought they would send me a letter taking me off beneifts, but they didn't and I stayed on despite being in full time education. So it's not a lot of money at all but it pays for rent, bills, food. The college give out bus passes. I don't feel guilty because I have never claimed benefits before and have been working for more than 10 years...
So you should be able to claim benefits while doing the course, just make sure you sort it out before the course, and then cut your hours at work down if you need to.. hope this helps