Job dilemma

So I'll try and sum this up succinctly.

I currently have a job on a Friday cleaning holiday (vacation) lodges. I did my first shift last week and it's really brutal, hard work, not enough time to do a proper clean etc. One hour for a three bed, kitchen cleaning, multiple bathrooms and living areas between the two of us. It's impossible to do a good job and with covid around its worrying.

I've also been offered a Saturday job cleaning a 4 bed holiday home, but I have little experience. I'm not sure why the guy hired me actually aside from him saying he had a "very strong feeling" I was right for the job. I didn't have an interview or anything.

The money is amazing, I could literally just do the five hours a week and get by (and I can clean decently, I have worked as a cleaner in the past and do my own house obviously) but I'm feeling uneasy about it, especially as I got zero feedback last Friday about my cleaning the lodges. He's going to send me more info tomorrow and he's said they'll help for the whole month while I get used to the house but what would you do? Just do lots of research and then go and try and wing it? I'm not a professional by any means and that's what's worrying me.