[GaelFG]

My two cents as former (and currently writing business plan for a new company) small scale entrepreneur : If like it seems your main problem with your current work is stress and overworking, full time company building without big net safety will probably be worse.

The empirical advice a give a lot in indy gaming development and that is validated by even successfull studio founders : if you think an office work take your energy and time and don't let you enough physical and mental energy to create your product wait trying not to starve without a stable income.

Something to consider : look for a new job less mentally taxing (one trick working for lot of people is to take one with work different from the one you will be doing in your company) even if less payed. Ideally look for part time job. They are great when you want to create company because by definition you have a maximum work time negotiated. Create the company before entering and put it in the contract 'I also have a side company i won't close and continue working on my free time'. If it seems hard to negotiate wait trying convince someone to pay for your product/service ^^.

It may slow a bit the startup process but not having to worry about paying your rent in three month can make you gain a lot of mental energy at the end of the year.