get a screwdriver & proceed with the steps needed to make a ram upgrade without replacing the current stick(s) to see what they are, or find a more technical pdf from asus
EDIT: actually maybe some software like cpuz, speccy, aida, or hwinfo might be able to identify the exact ram model to mostly confirm what size it is
open taskmanager & actually look at the usage hitting 7+gb
programs should NOT shut down, that is not normal or ram capacity related on a 'modern' OS... unless you're purposely disabling the pagefile or making it below 8gb
poor performance could be being a mobile cpu, lack of gpu acceleration, etc... so what happens if you're still sluggish after the upgrade, only reducing freezes?
EDIT2: i find 'presents' like these (individual random component) so weird... they're not personal, they're chosen under stress, they're something you can afford to do on your own, what's the point of ONLY ram being a present?
on top of that photography equipment is so much more relatively expensive.... yet having a sweet $150 tripod sounds like a much better idea than ram
spend that $150 to go indoor skydiving with your wife with a third person making a video of it
EDIT3: i've never actually used an SSD so even i'm not sure about the extent of it helping with workflow