Is this appropriate to wear to a funeral?

I have a funeral on Friday, and a low budget for new clothes. I got the pants from Walmart, and the shoes and shirt from a thrift store. I need to get cuff links for the shirt, as I didn’t realize it requires them.

I am struggling to find a jacket in my price range. Will I need one? I live in Michigan, so it is around 40-50 degrees here right now.