If you're serious about your side-business, either quit your "normal" full-time job and ask family/friends/partner to support during the time you need to do what you're trying to do in order to have the best chance at success. Otherwise you risk wasting time, money, under-performing at your "normal" job, only performing mediocre at your side-business and putting strain on relationships with your loved ones because you are trying to do too much... If you don't want to risk it to take the biscuit, then question whether you believe in your idea as much as you think you do.