It's not so hard, really - the start up is the most complicated bit, and if your husband is the sole employee of the ltd co, it really isn't hard at all.
I would say you do need an accountant, only because it sounds like you don't know much about it, and it could get stressy!
If your DP is doing this to earn in the most tax efficient way.... then he will want to pay himself a mix of salary and then take the rest in dividends, as they are taxed at a lower level. There is an 'optimum' amount to pay yourself, where you get your NI credit (towards your pension) but neither you nor the company has to pay class 1 NI contributions. It's around £620 per month, which annually would keep you under the personal tax threshold (no personal tax to pay) and then mean you pay yourself the rest in dividends, which are only taxed at 20 percent.
but I still say, get an accountant! I pay mine about a grand a year. They do my VAT Returns, my personal and corporate tax returns, and advise me when I need it.
It's not worth having a ltd co if you don't earn very much, or don't expect that to change - but if you pay a fair amount of personal tax at 40 percent, it's probably worth it.
That said, there are rules about the kind of work you can and can't do via a Personal service company (which is what this is) and you don't want to fall foul of those. Again an accountant will advice, but look up IR35 rules with HMRC.
Good luck.