If you pass my quiz and assuming you are creating a new complicated product you can’t make your self then here is what to do next:
You will be doing a lot of purchasing in the process so use the rule of 3. Find at least 3 suppliers for each of the next steps and pick the best not the cheapest within your means.
Find designers for your product.
Find manufacturers for your designs. Ignore step 2 and 3 if you can produce it yourself.
Make prototypes.
Find photographers to make nice pictures and leaflets.
Find distributors for your products before you start manufacturing. Book orders then start producing.
If you want to sell online find marketplaces like amazon or make your own website. If you need to make your own website then find website designers on sites like freelancers.
Find advertising outlets.
You can try unpaid pre orders online to make your product and put in mind 30% won’t pay.
Stock lightly and grow the stock when you have sales growth.
Join my discord community to share the problems you will face and get help then help others from your experience. Link on my profile.
Good luck.