Hi there, I am Sayuru and I am an experienced Shopify developer, Designer, and a Partner for 3 years. According to your Project, I understand 3 things and I had mentioned what can I do.
You are waiting to sell to America, Canada, and Australia_
I can set up your store to sell America, Canada, and Australia. But except them, I can target worldwide shipping too.
You are concern about the shipping time and Prices_
Any seller is concern about shipping time and prices to keep a good rating for them. So I had a solution for this. There was a special shipping service which is low cost but it has speed shipping to worldwide. we can add products that offer that shipping service to your website via Ali express. The price will be different from seller to seller and product to product. So I cannot tell a definite price.
I will charge $195 without including the Shopify template fee. setup a payment gateway with fraud prevention, Installation and customizing theme, 50 product uploading with Description and variants, page designing and categorizing products, Install necessary apps to email marketing, maximize sales, marketing and any more up to 8 apps. Setup an Instagram shop for eligible orders. SEO your site. Policymaking, Shipping setting include your interest, Google analytics and facebook pixel. FREE GUIDE FOR MARKETING
check this website www.casetyle.com. It was designed by me based on free theme except for payment system.(He had made some changes on that website)