23 sales for six months…Is it a little?
Its good. Now you should look at your portfolio and find out what works and what doesn’t and go in the obvious right direction with future releases. Plus you should try the promotion thing, it works.
You should take this time to make more and diverse sounds and music. Rome wasn’t built in a day and someone had to do the work.
I would focus less on sales and more on the quality of your work. I work on sound effects because it’s fun and I can make a bit of money from them as a reward for my efforts.
A good artist enjoys his work more than his money.