Only time I use the jack is to remove wheels.
Made my own ramps years ago.
Get some 2 x 12" lumber, cut the first ( bottom piece ) about 48" long, the second piece ( to be nailed on top of the first ), about 42", the next piece ( to be nailed on top of the 42" one ) about 36" long, etc.
When you're as high as you want to be ( mine is about 5 high ), nail a " stop strip" to the front of the highest board.
When you use the ramps, be sure to set the parking brake and you could block the back wheels as well for good measure.