Some of your efforts will bring valuable results. Other efforts will bring valuable experience.
No effort is wasted when you choose to value it. Everything you do serves to eventually move you forward.
Anticipate what might go wrong and take steps to avoid those things. But don't make the mistake of avoiding action altogether just because there might be problems.
When the goal is worthy and meaningful, get busy and make it happen. Focus on the end result, expect the best, and make the commitment to deal with any obstacles that might arise.
Sure, it's easy to compile a list of excuses for not taking action. But that will get you precisely nowhere.
Though you know it won't always be easy going, take bold steps forward anyway. Be willing to meet the resistance that you know will come, and to work your way through, and real achievement is surely yours.