I’d rather not fry anything, so if someone has done this before, I’d love some input.

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Hey! I’ve been through a similar setup when I used a PA-07 micro actuator for a mini automated drawer in my workshop. You're totally right to be cautious — direct 12V with a DPDT switch works fine for simple extend/retract, but I highly recommend adding a fuse inline with the power supply to protect the actuator just in case something shorts. Also, consider using a momentary DPDT switch instead of a maintained one unless you plan on watching it constantly — I had one get stuck extended and overheat a bit. If you're thinking about automation later, grab a controller that can regulate timing or stroke length. This guide helped me tons when I was wiring everything up linear electric actuator: https://www.progressiveautomations.ca/collections/linear-actuators