7. Company Structure - What Type of Business
Retain professional advice on how you choose and proceed.
In the UK you can choose to be a Sole Trader or Limited Company
It is straightforward to become a Sole Trader but remember you are personally responsible for your business’s debts.
A Limited Company’s finances are separate from your personal finances, but there are more reporting and management responsibilities. [https://www.gov.uk/running-a-limited-company]
Register your business with Companies House or the relevant authority in your country. In the USA and other countries, there are different rules and different options. e.g. registering an LLC.