You have a good chance to fail at anything. Many people take up chess and fail to become competent players. Many competent chess players aim to become great players and fail. A significant portion of great chess players aim to become the best in the world and fail (some of them end up happy and successful in the chess world despite this failure). It’s the same for every sport, cooking, diet, exercise, math, science, etc. People fail a lot at careers or college majors.
It also depends on your goals. If you want to be a great thinker, there isn’t a reliable alternative to CF. I have argued that a lot of the philosophy alternatives are basically counter-productive and have approximately zero chance of success (their ideas are decisively refuted and they have no representatives who will discuss/debate the matter). But even if they weren’t refuted, none of them claim to offer a reliable way to become a great thinker, and many aren’t even trying to create great thinkers.
If you have some other goal(s) besides being a great thinker, then the relevance of CF and many alternatives could be considered for whatever those goals are. Parts of CF can be useful in more modest ways. People do often fail at smaller goals due to irrationality, poor thinking, poor problem solving skills, etc. CF could help with those things.
What I criticized in the quote was someone with a goal to do CF but who plans to do nothing related to CF for years and then do CF later. That is generally a bad idea that results in a lower success rate. I would have a similar opinion for other things, such as self-help, meditation, chess or a paleo diet: if someone wants to do them but plans to do nothing for years and then get started later, I doubt that’s a good plan.
It sounds like you’ve had some sort of failures or inner conflicts that you haven’t shared. If you want to talk about them then make a new forum topic (since it’d be off-topic in reply to this article) and you can share about what you’ve tried and what you think went wrong. If you share that and want advice, you can ask for it. It’s hard to say anything very helpful without knowing what you’re personally getting stuck on. I and the other forum members don’t currently have much knowledge of what’s going on with you.
And while it should go without saying: If you don’t want to talk about your problems in a forum topic, then don’t. You’re the one reading my articles and coming to my forum by your own voluntary choice; I haven’t asked you to do anything and you’re free to leave and stop paying attention to me at any time. If you feel pressured in some way and you think I’m doing something to pressure you, I would appreciate information about it because that is not my intention and I don’t think writing impersonal, philosophical essays is pressuring, but if there is some problem with my activities then I would like to fix it.