I would like to make the Sidebar sticky but i don’t know how can anyone pls help?
Shop: https://spaccio-vintage.myshopify.com/
never mind it works now
Sorry you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community! 
Thanks for your good question.
your store password protect,
I will check out the issue and provide you a solution here.