Need Electrical Help
This is your main panel, so neutral can be landed on either of the N/G busbars

Since you are working in your main panel, where your service disconnect lives (in fact, I can tell offhand from the construction shown in your photo that this is a meter main device we are looking at, so it can't be anything else besides your main panel), you can land the white neutral wire on either the left-hand or the right-hand neutral bar.  This is because the neutral and ground are bonded together here (and only here!), so the busbars down the sides do "double duty" as neutral and grounding bars as a result.

Send that alien back whence it came!

However, that's not the only thing you need to do.  That Square-D HOM115 you put in for the new circuit has no business whatsoever being in a Siemens meter-main, so you'll need to remove it and return it, then install a Siemens Q115 in its place.  Once that's done, you can wire up the circuit as described already, with white and bare to separate holes on the neutral (grounded) bars, and black to the breaker lug.

TORQUE ALL LUGS TO SPEC

Last but not least, you will want to use an inch-pound torque screwdriver to tighten the busbar and breaker connection setscrews to their labeled tightening torques.  This is required by 2017 NEC 110.14(D), and is a good idea anyway, since the performance of set-screw type connections depends rather critically on proper torquing.  You don't want your new outlet to give you the loose lugnut now, do you?