Hi over, yes next move def an accountant, he can sort out all tax details, much easier and a lot less stressful! Low salary, yes £500 ish per month, then dividends, acc will advise.
As for marketing, you will have to tailor to your profession, direct is good but can be costly, maybe a website, or promotional stuff pens, pencils, mugs, all depends on your market.
Remember expenses, vat, ask accountant about mileage v co car etc, all makes a difference to your vat bill, and the evil end of year.
My advice would be, get a good accountant, be organised, organised, organised, apart from that... Go Get Em Girl!
Good luck, be confident in yourself and your business, be proud of what you do, and have fun. Cant lose!