Hi Ceaton
If you are planning on selling as a business with your own designs and buying from China, I would suggest to do the following:
1. Register as self employed.
2. Secure a domain name.
3. Get your own website (simple, but functional ) & research platforms to sell directly on. (Etsy, NOTHS will be good for your products).
4. Research the market for potential competitors and pricing.
5. Register your designs.
6. Design and have your logo ready.
7. Understand the fabrics you will be using.
8. Get 10 quotes for your clothing with your required branding from several companies in the UK, as well as other countries. It's important to note that most suppliers will have minimum order requirements.
9. Request samples from a shortlist of 3. (Don't provide your original designs at this stage)
10. Compare prices, quality, printing and communication with the 3 suppliers and choose the one that ticks most/all of your requirements.
11. Understand the order processes involved, whether you decide to buy from a UK or overseas supplier.
12. Request a sample and negotiate a price, to include everything (product, packaging & labelling).
13. Tell the suppliers that your designs are registered (easily done) and get them to sign an agreement that they will not show, print, or supply your designs to a 3rd party.
14. Confirm the sample to the standards you require. note any amendments that are needed.
15. When you are happy with the sample, proceed to an order, after agreeing all the details, including payment terms.
16. Ensure you inspect the products before you make any final payment.
17. If you decide to buy from outside of the EU, then you will need to register for an EORI number (easily done) when your shipment has been booked for delivery.
18. Don't order more than you will need, the smaller the quantity your supplier will agree to, the better.
19. Select the size breakdown that best meets your target audience for your first order.
20. Don't overestimate your sales during the first year and ensure you have sufficient funds for all the above, including marketing and your working/living expenses.
I wouldn't advise buying from China during this early stage of your business.
When you feel you can start to order 300pcs (minimum) per colour/design, then at that point consider China.
If you need any further advice or assistance, feel free to contact me via the website below.
I'd be happy to help you get your business off the ground.
Best of luck with your project.
Ron