We know the feeling - trust us! We only joined this month and we also had our first sales recently.
The stock audio market is not a sprint - it’s a marathon (like many others stated countless times here on the forums). So keep it up, keep writing and producing, set goals and success will come even before you’ll realize it.
Excellent debut with your new track Cine Tracks and wellcomed on board.
The first advice as been said by PremiumNotesLibrary is keep working for the long term and there will be fruits for the hard work when you reach to get a big portfolio.