[demircancelebi]

Validate demand and validate yourself.

Validate demand: You should understand whether you can launch a very crude version/maybe no product but customers lined up to pay you for your thing which'll become ready soon and get some validation from the market. If you can't do this, what makes you think that you can do it after you quit? Stay at your job if customers are not ready to throw money at you. If you can see solid demand, you should validate yourself.

Validate yourself: Do you think you are mentally prepared? Do you have enough savings? You probably have the skills to create a product, but do you have the skills to create a company? Will you enjoy working on this for the next 5-10 years?

On savings: Do the math for yourself, but in order to be able to work without financial stress, you should have enough money for = ((number of months you foresee your startup to take off) x 2.5[correction for you optimism] + 3-6 months[It'll become hard to work stress free and irrational to continue if you don't have something solid, so better go get a job now]) * (amount you think you'll need in a month * 1.3-1.5[you are also optimistic about your expenses])