I had this issue and was afraid to lose my money to online poker. Huge anxiety. But, remember, with anything new you learn how to do properly, you have to pay "the tuition". There is literally no way around it. Whether you learn a job from others, study at university or take a private course, you pay someone in money or time to learn how to do the job you wish to be doing.
Poker is no different. We all pay our tuitions and eventually start earning from our jobs. It's universal. And whoever says otherwise, they lie. First you pay, and then you earn. Full stop.
Best way to go about it is to think like a child. Children don't care and don't plan ahead. They just do it and get obsessed over anything they try to do. They do it for fun and enjoy every little step of it.
I played freerolls, gathered a bankroll, lost some, gained some, studied, practiced, deposited some insignificant sums (which I eventually gained back). I'm still not ready to deposit huge amounts because I feel like I don't have enough experience, and I can't afford to lose anymore than what I am playing for now. However, I am slowly building several small bankrolls until they become fortunes or until I feel comfortable with my skills to risk more and move up the levels.
Right now I'm still at the stage of cleaning floors and scrubbing toilets. And there's a looong way to get to sit on that chair in the office.