I can only do about 10-15 with 7kg bicep curls, should I be worried? Beginner here

Not even 3 sets. Usually get super tired after doing 2 sets. And my body is also telling me I overtrain.

Am I really in this bad shape? Anyone got any help understanding only thing from internet I found was talk about big bodybuilders not beginner stuff who joke about 7kg being small weights and this video of this skinny slut doing 50 like it's nothing with 5kg:

youtube.com/watch?v=yJNA941dyAI

by BiggestSlut99 via Bodybuilding.com Forums - Female Bodybuilding