Assuming you're not genuinely depressed or something, you need to figure out what you're afraid of. There's some "the worst that could happen" that you don't want to face up to. Losing money? Looking foolish? Potential clients laughing at your efforts? That you are somehow not good enough to be a capital-e Entrepreneur? Or (most likely) that you'll struggle in your first shot and the escape fantasy isn't as easy as those podcasters make out?

You have anticipated the advice people will give you in your first paragraph because it's the right advice :) You weren't a perfect driver the first day your mum gave you the keys, right? The only way you learned to drive was by driving, and it's the same with putting yourself out there and trying to make some side money.

Pick a model and jump in. You say you work out so you know that the people who just go to the gym every couple of days and lift/run without thinking too much about it are in better shape than the "experts" or perfectionists who stay up late putting programs in excel and reading starting strength and ordering adipowers but .... never start. Same thing here. Pick a model, commit to 30 days of "one hour of effort a day" and see where you are on May 28. You will have learned something. It may be that you don't want to own a business, or it may be that you don't want to own that particular business, or that you want a partner, whatever, but jump in. 30 days, you can give us that, right?

And turn off the damn podcasts!

(I work full time in a very demanding job, work out and generally have a life and am on track to sell $10,000 - $15,000 in my first 6 or 8 weeks of launching a couple of private labeled products on amazon. Not big bucks yet but it's a start and I just .... did it, an hour or two a day and some long Saturdays of checking items off a task list. If you want an accountability buddy, PM me. Or just commit to 30 days and I'll check back in with you at 10 or 15).