Should I resign in my first job?

Problem/goal: I feel overworked and overwhelmed in my first job. Should I resign?

Context: It's been almost 8 months since I started my first job, and it's exhausting. I'm in the sales, and there's no commission. I have to work on my rest days and holidays because my supervisor insists that we should be working 24/7. However, I want boundaries, I won’t work if it’s not paid. As she told me I would receive commissions, but I haven’t received any. She also said the job would be hybrid, but after two months, I was required to work fully onsite. She keeps calling me, even on my rest days, and expects me to respond immediately.

I don’t just talk to clients, I also handle contracts and present to managers and even executives, as it’s a new team in the company. Everythng is from the scratch.

I go to work feeling anxious every day because she constantly reminds me that everything is urgent. I also feel shy around other departments because she always pressures me to follow up with them persistently and tell them it’s urgent. I really want to resign, but is this just a phase that every job has? Or is it simply not worth it?