Ah, you’ll be fine - just don’t drop 'em or shake 'em and they’re pretty tough little buggers.
We used cloth nappies because disposable ones were hellishly expensive in Japan - I actually prefer them for avoiding rashes, but bear in mind that you’ll be doing a *lot * of washing if you do, and you’ll need plenty in hand: they can go through 8 or 10 a day without breaking stride.
Put 'em on their backs at first, to avoid suffocation: they can move their heads sideways fine, but newborns can’t turn over like we can. If they’re sleeping happily, leave 'em be.
As far as you and your husband “handling it” on your own, most of it’s just common sense, and will quickly become routine. Just be prepared for the interrupted nights and lack of sleep, especially for the first three months. If your husband’s working, he may need you {and the troops} to carry the a bit of the load for a while: it’s hard being super-dad changing nappies and helping with the feeds at 4am and doing a full-time job as well.
Call in the troops when needed, if they’re cool with it - if your Mum’s willing to help, let her. Like flodnak said, it may be something as simple as keeping an eye on the baby for a couple of hours in the day while you sleep: normal time-keeping will be a thing of the past for a while, so sleep when you can, let the housekeeping slide if you have to, and don’t be too proud to ask for help - it’s not a sign of weakness, just good sense.
It seems daunting, but the actual mechanics of caring for a baby really are easier than they seem at the outset: feed 'em, burp 'em, wipe 'em, wash 'em and put them to sleep. Repeat several times a day for a few months.
They’re exhausting mechanics, but after a couple of weeks you’ll be an expert, and the first three months do go past incredibly quickly - mostly in a sleepless blur - and then you’ve done the hard part.
All the best, and feel free to post again if you need more advice or suggestions: we seasoned veterans are always willing to show how knowlegeable and gung-ho we are. Feed 'em tomato sauce and potato chips? Sure, why not? Seriously, though, it may not seem like it at 3am when you’ve had 2 hours sleep and are up to your elbows in shit for the third time that night, but you’ll never have a more rewarding experience. The bad parts will pass in a blur, but the good bits you’ll remember all your life.