Idk how to evaluate/price myself

I am in my final year and had built some projects, sent it to a founder and he had mailed me for the founding engineer role skipped my coding assesments and just did a product fit test. We have been talking on private channel for a week continuosly on how can we improve the product. He now is telling me that he is considering me for SE L1 role. I think he is not wrong coz I am new, I have never worked with a company. We have to now talk on the salary, I dont know what to ask at all. This is a remote job offer from a US pre seed startup. Theres a 3 month paid trial period. Can someone explain me how the pricing works. Job is mostly infra, go, python, kubernetes and Cloud native tools