I think with electronic stuff you can get real far because you can get it in bulk and you can make a lot of profit with it.
Also food is a bit too much a big company can do this but if you are just alone this is not gonna work in my opinion.
Believe me that will goes thru a difficult process and might lead to crashed. OP's online shop will only accept bitcoin as payment. No way buyers or customers will just send bitcoin to an online shop which is far from being legit although let's say OP's site is legit. The basic payment will be pay first so for others customers it's risky to think and much more risk if the buyer lives on other country so shipping will take time.
If that will be pushed then OP must spend big budget for a big advertisment that so that buyers will really see that the shop have big funds on hand and will not be a shit shop someday.
If you are worry about it you can use the escrow services with the manual trading. There is bot has implementing to have a mutual trade, if you have site you can implement escrow bot on it. There is huge number merchants and businesses accepting bitcoin nowadays.
Please refer the below link to find the list of bitcoin shopping options.
https://blog.wetrust.io/list-of-merchants-that-accept-bitcoins-9f4f991b95d1