but cant bleed by myself...
Try gravity bleed. Top off master, leave cap off, crack the bleeder open a few turns and go work on something else a bit.
Just keep an eye on fluid level.
Doesn't work on all vehicles, but most non-ABS setups should start flowing soon after.
Back when I was doing a lot of brake work, I'd have pistons pressed back in on both calipers, then mount up the left side with the new pads, open the bleeder and go round and reassemble the right side while keeping my eye on the left. It would usually start dripping fluid right about the time I was torquing down the right side. So I'd crack that bleeder, top my fluid level, cinch down the left and wait a couple minutes for the right side to dribble.
If your lucky, you can finish it up same way. Pump the pedal to seat your pistons, then rap/tap the LH caliper a dozen times with a little ball-peen to work the inevitable air bubbles up to the top, open the bleeder again and watch the bubbles come blirping out until solid fluid oozes. Then re-tighten it, repeat on the RH side and clean up your DOT-4 drizzle with a little Brakleen.