First: It's not like ice are going to walk up to white girls with blue hair and be like, 'No voting for you, liberal.' They don't need to assess anyone to guess how they're going to vote: the plan is to just reduce overall turnout at voting sites in places with a lot of Democratic voters.
The way I expect this to go is for Maga folks to drive into big cities and station themselves outside voting sites in poor, non-white neighborhoods and pretend they're 'looking out for non citizens who might try to vote'. The goal is to create hassles and long lines so that people who have limited time decide to leave instead of wait.
If you are able to arrive early and don't mind waiting you'll be fine. But a better response is to contact your county and volunteer as an election worker. If you do, you can help enforce distance requirements for observers, make sure there are no bottlenecks, make sure there is seating available, keep the line moving in good spirits, etc.
If you just make voting smooth and efficient as a volunteer, they lose.
system is precisely engineered to be immune to the political will of the working class.