I've got a chevy. Normal 3 ton daytona jacks for fine for me. I jack up the rear from the differential, otherwise you are just expanding your springs. Same with my floor jack, 3 ton. My only caution with 6 ton is that could be dangerous on the civic. 6 ton stands will require you to jack that civic up high jjust to get them on the stands.
My rec:
4x 3 ton jacks from harbor freight or any reputable auto parts store.
1x 3 ton hydraulic floor jack pretty much any brand, it doesn't matter that much.
1x pair of Rhino ramps for oil changes.
You shouldn't work under the car without stands or ramps. I'll do work with just the jack, without being under the car, just think about it before you crawl under.
For oil changes forget about jacks and get a beefy pair of Rhino ramps. I've done everything, oil, trans, diffs, transfer case with ramps. So much safer. Jacks only come out for tire rotations.