If you are voting the opposite of the norm in your area, you are making a bigger impact than the reverse of the situation. Go by county and try to flip yours to blue. If it happens to flip, your vote counts 100%, otherwise you have at least tried and voted. Here is some links to check 2020 results by town or county.

https://www.nytimes.com/interactive/2021/upshot/2020-election-map.html

https://brilliantmaps.com/2020-county-election-map/