I'm from the UK as well and it's very very relevant that you've mentioned that.

UK is the perfect place for you in this situation. US people might give you advice based on their legislation so be careful who you listen to

1. Set up as a sole trader with the HMRC (the equivalent of IRS for US readers that are curious) 2. Declare your profits 3. You'll pay taxes (and everything is legal as well) on the following brackets: https://www.gov.uk/government/publications/income-tax-person...

Scroll down to the chart to see what I'm talking about but here is the highlight:

Any profits between £0 and £12,500 are untaxed — you have to declare them though.

So I'd say yes, don't form a company yet. Godspeed