How exactly do I get them to accept my fastlane ideas?
There's only one way to get them to accept fastlane ideas...
Start making money and supporting yourself off of it.
Until that happens it's all a wonderful fairy tale in their eyes and they will try to knock you back down to reality, which is understandable.
Try telling someone your dream is to be a pro athlete. Most will rip you to shreds. Some will tell you to go for it. Few if any will believe you can do it unless you show them the results. Show them how much you can bench, how high you can jump, and how fast you are and maybe they will start to think you have a shot. But until you show them proof they will all doubt you.
Nobody doubted Lebron James' dream to go to the NBA. You could see him play in high school and become a believer yourself because he showed you his skills.
Same with you. If you start showing them your skills in business (making money). They may just become a believer.
I can just imagine a family party and a relative asks your dad, "So did your son find a job?" "Well no he's been running an internet business." "Oh how's that going?" "Well he used up all of our money and lost it all." "Oh my! He should just get a job instead of gambling with your money!" "I know."
What if instead your dad said to him, "Well he moved out and bought a new car with cold hard cash! He's really got that internet thingy working for him." Your relative would probably say, "Oh my! That's impressive. What business does he run? Tell me more!"
It's not about the idea, it's about the results.
Don't tell them you are going to make money. Bring home some Benjamins.