Yay or nay on website plus registery question

Hey yall. So we are getting married June 12 ( hopefully) of 2022.



We are having a small gathering like 20 people.my parents on my side are calling everyone and making sure they'll come and so is my fiance's mom.
Creating a website for me sounds super overwhelming and I have no clue where to start if I do. I'm on the spectrum and certain things seem arbitrary when it comes to planning. Which comes to my next question when I send the invites( we are not doing a shower or a party) can I not stick an extra piece of paper along with the invite for the registries in the envelope? It should be simple right?