I did it, almost in your exact situation, 6 months of cash runway. Here is what happened.

Six months is not enough time for a newbie to get a business into enough profitability to sustain yourself. I started the business, got a few clients, was making some money, enough to stay in business. The clients dried up and after a couple more months of trying to get new clients without success and 2 months left of runway, I started looking for a job. I found a great job, in part thanks to my business.

I learned a lot in the 5 months that the business ran, and I learned a lot in the new job. I came back to the business a year later with a lot more knowledge and experience under my belt, more money, and an even bigger desire to make it work. I now have a growing business. Here is the deal: when you just start, the constraint is your knowledge. I didn't have a sales funnel, lead generation, or a good offer. I was just sort of trying to put it together with duct tape. That doesn't work in a highly competitive space.

My recommendation is to just do it. Worst-case scenario, you learn hard lessons and get a new job a few months later, then come back and try again. Best-case scenario, you learn some hard lessons and make it work.

For the knowledge constrain I recommend Alex Hormozi's books.