First of all please mind that it can be ricky anyway. Buying from Alibaba and selling on Amazon as a whole, you must exercise caution. Knowing the “rules of engagement” will help you mitigate the dangers of reselling from Alibaba to Amazon. I recommend to check out this cool guide about alibaba to amazon fba pirscapital.com/blog/a-guide-to-selling-alibaba-products-on-amazon/ to be on the safe side
After shipping your product, it will take more than 30 days but Amazon cannot accept shipments of more than 30 days.
So if you are living in the USA then bring that shipment in your home and if not then contact 3PL( third party logistics). they can easily take your shipment into their warehouse. After this process, you can easily transfer your shipment into the amazon warehouse.