Are you running your own node? I can help you set up btcpay server (you will need your own hardware and domain though). btcpay has its own integrated simple app with shopping list and a cart. It's probably not something really nice you are looking for but not something you will want to get rid of when you get the website you want, it can then be integrated in to you website afterwards.
Discussion
I already have a btcpay server available to me from they guys of agora256. I just need my website and some time to work on it. I don't have time man.. I just need a few buck tbh. I did a lot of sales recently but I spent everything for tools leather and rent. I'm running out now. I should've put more focus on website earlier.