Yeh you can try opening up rears & see if will pump fluid through then do front then go back & do each circuit back to front couple times to make sure all air out. If got abs you may get problems & need loosen lines at abs unit to try shift some air, if all fails you might need a vacuum pump.
Ball valve like get on car washer lines are good on the hose and jar method as cut back on reverse flow & can speed up the bleed process .
Have seen a second car used as vacuum source with long hose to nipple with short clear section and stop valve so can block line before fluid drawn into second engine lol.
Bit of a hillbilly trick & not overly recommended but handy if in a real jam .
Got lucky on piston rings in end, glad got refund & all worked out good & in spec .