This will be a challenging time due to the COVID-19 lockdown. Here are some links from around the web with articles, classes and videos that can make this celebration easy and enjoyable with things to do while at home.
How to enhance your Shavuot during the coronavirus pandemic
Delightful Dairy Menu for Shavuot
How to Celebrate Shavuot at Home
The Coronavirus Pandemic And Shavuot
Enjoy the Holiday!