Nobody can responsibly give you any words of confidence. If you share it it will be shared.
Many people will respect your wishes but it is highly likely that some will not.
The bright spot I can offer is sort of a left handed one:
A substantial element in the value of an image is confidence and appreciation of the artist. Should you have 100 pieces of art and nobody knows about you, your art collection is worth less in value and utility than if you'd given away 10 of those pieces and became famous. The remaining 90 are worth more than the previous 100.
That presupposes that you'll produce more than 3 pieces of work. But showing off your work is the best way to get feedback and inspiration. You will likely create more work if you share it.
It is of course everyone's right to determine what they do with their work and how they share it. I think many creative people mistakenly keep work rather than set it free. They lose the attention free work might give them. As they progress in their skills your earlier work becomes more valuable as a calling card than as an ultimate achievement. The work you release for free may not be paid for in dollars but it will be seen by more eyes and get you more responses and attention. Free work that resembles the buyers needs is the best way of establishing yourself.
Most people with very little are convinced to value it highly by people who have a lot to sell. Keeping your small contribution from the public eye also reduces your stature and enjoyment of your art. That in the end can be too big a price for you to pay.