Get a flatrate accountant. Costs around $150 monthly for the cheapest option, includes yearly account filing. If you're selling to other EU countries and you reach the threshold of 10k EUR, you would need to get registered for OSS (means you would pay VAT for all EU member states in the UK) which will increase monthly accountant to around $250-300, if you have any warehouses in the EU you would need to get a VAT ID in that specific EU country and you would probably have monthly costs totalling $300-400.
Yes, the EU discourages small business / entrepreneurs as it's a Democracy.