If you think your moonlighting has merit but you feel overwhelmed, look for remote partners who can work with you, and/or go hunting for finance. Finance is critical, because it will allow you to part ways with DumbCo without putting you and your family into hardship. If you can't face the idea of asking around for money, then you'll likely never be suited for business anyway, so just give up and dedicate yourself to the family or to bettering the company you work for, or to find a better (remote) job -- that's more or less what I did, back in the day; as depressing as it sounds, it worked out OK.
Btw, if at any point in time your employer (pedestrian web-design agency, by any chance?) takes you to task for you being "distracted", taking too many personal calls etc, turn it around as their fault: they clearly cannot motivate you, and anyway everyone else is playing on their phones.
The alternative to all this is just to put your head down and revolutionise the company you work for. Do things the way you think they should be done, the way that will result in higher productivity. Believe it or not, a lot of micromanagers simply don't have the bottle to repeat a challenge more than once, and after a while they'll probably leave you alone or recognise your approach actually has merits.
Both scenarios are really a way to say that you'll have to man up. There is no easy way out; but nothing risked, nothing gained...