Nope. It actually says “believe on the Lord Jesus Christ and you will be saved”. Believing on denotes a dependence. Believing in cans simply mean that He is your savior but doesn’t denote dependence.
>>I could do that on a golf course,<<
It has happened. If it’s a conviction and putting trust in Jesus alone it doesn’t matter where the conversion takes place.
>>no sense wasting time at Mass any longer<<
Those who truly depend on Jesus as their savior don’t consider it a waste of time to gather with other believers. Do you somehow feel it an obligation?
Good point. It is a salvational faith. And it is reflected in a once-for-all affirming decision. “Yes, I yield my life to accept the eternal Savior unto it.” And if you then (in time) turn your back or stumble away... here come the trials. Meant for LOVE, for your good! God will insist that you see the light even if it takes feeling the heat to get you there. But if you get on top of the game again, you will progress well and be a good witness, with satisfying conquests of sin and hell, and with joy.