Every time I’ve got free time - I spend it either on one of my side projects or blogs. The problem is I can’t get a good chuck of uninterrupted free time.
What are you doing when you are not free? How many hours a week do you work? How much time do you spend with your partner? What about exercise?
What is interrupting you? My guess is that your side projects and blogging are eating up more time than you may realize. Honestly sleep, work, eating, chores and general health and hygiene eat up the majority of a working persons week. If you have kids, pets, a house, loved ones to care for, then kiss any spare time you might have goodbye.
> Side projects and blogs
As in, multiple different side projects and multiple different blogs?
Maybe that's your problem. Pick one. One side project or one blog, and park the rest.