8gb or 16gb ram?

I have an ASUS ROG Zephyrus G15 GA503RM with an RTX 3060. It comes with 16gb of ram, 8gb soldered + 8gb removable. I'm not exactly sure of the specs of either of the ram sticks. I use the laptop mostly for gaming (helldivers, monster hunter, roblox, etc) and I can run most games fine on max or medium-high graphics. My issue is on some games, I think my memory is the biggest source of lag. On helldivers or Deep Rock Galactic my memory can get up to around 80-90% even when solo. Not to mention discord calls push it to the limit, making things noticeable more laggy.

I currently don't have to means, or the need, to replace my upgrade my entire setup, and I only have one slot for ram, which already has (I assume) dual channel 8gb, and 2 ssd slots (default ssd is 512gb, im adding a crucial 1tb for $64).

My questions are as follows:

Would it be worth it to replace the one 8gb stick with a 16gb stick to increase memory?

Would doing so negatively affect dual channel effecirncy or gameplay/work in any noticeable way?

Sorry for being a noob!