This question involves quite subtle points of English style. The proposed sentence is perfectly grammatical, but the verb "experience" is not the best choice for all three thoughts.
It would be more natural to say I will overcome my fears or I will learn how to overcome my fears. "Learn" is a better choice of word than "experience" in this context. (As Lambie says, suggesting that the visit is raising material fears that may not be possible to overcome is probably unwise as a practical matter.)
It would be more natural to say I will better appreciate that taking risk is necessary to succeed in life than I will experience the fact, which presumably I already recognize as a fact, that taking risk is necessary to succeed in life. (Of course, once again, suggesting that a visit to the US is so risky as to be worthy of comment may send an unintended message to your audience.)
As a matter of style, the lack of parallelism in the originally proposed sentence reflects a poor choice of verb and can be fixed by breaking the sentence into clauses or sentences with more appropriate verbs.